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The first book devoted exclusively to the spectroscope and its use in gemstone identification. Until 1933 the refractometer and the microscope were the two principal tools in gem testing. Then B.W. Anderson introduced the hand spectroscope which quickly became the third vital instrument for the UK gemmologist. The publication of Anderson's papers in the mid-1950s alerted gem laboratories worldwide to the importance of this instrument. Today its use is universal.Anderson and his lifelong colleague, Payne, both of the world's first full-time gemmological laboratory, were the pioneers in recognizing the vast potential of the spectroscope for this purpose, and The Spectroscope and Gemmology, as the extensively edited, updated and enlarged version of Anderson’s original papers, provides a vital textbook wherever gemmology is used or taught. The distinguished gemmologist R. Keith Mitchell has undertaken the editing and has added chapters on the Pye spectrophotometer and on lasers. He has also reproduced new line drawings of spectra in three aspects to accommodate the prism instrument in both the British version and in that favoured by American gemmologists, and in another version as seen through the diffraction grating instrument.Written for gemmologists everywhere and incorporating the latest developments this book will prove indispensable to all engaged in gemstone identification.

The first book devoted exclusively to the spectroscope and its use in gemstone identification. Until 1933 the refractometer and the microscope were the two principal tools in gem testing. Then B.W. Anderson introduced the hand spectroscope which quickly became the third vital instrument for the UK gemmologist. The publication of Anderson's papers in the mid-1950s alerted gem laboratories worldwide to the importance of this instrument. Today its use is universal.Anderson and his lifelong colleague, Payne, both of the world's first full-time gemmological laboratory, were the pioneers in recognizing the vast potential of the spectroscope for this purpose, and The Spectroscope and Gemmology, as the extensively edited, updated and enlarged version of Anderson’s original papers, provides a vital textbook wherever gemmology is used or taught. The distinguished gemmologist R. Keith Mitchell has undertaken the editing and has added chapters on the Pye spectrophotometer and on lasers. He has also reproduced new line drawings of spectra in three aspects to accommodate the prism instrument in both the British version and in that favoured by American gemmologists, and in another version as seen through the diffraction grating instrument.Written for gemmologists everywhere and incorporating the latest developments this book will prove indispensable to all engaged in gemstone identification.

The first book devoted exclusively to the spectroscope and its use in gemstone identification. Until 1933 the refractometer and the microscope were the two principal tools in gem testing. Then B.W. Anderson introduced the hand spectroscope which quickly became the third vital instrument for the UK gemmologist. The publication of Anderson's papers in the mid-1950s alerted gem laboratories worldwide to the importance of this instrument. Today its use is universal.Anderson and his lifelong colleague, Payne, both of the world's first full-time gemmological laboratory, were the pioneers in recognizing the vast potential of the spectroscope for this purpose, and The Spectroscope and Gemmology, as the extensively edited, updated and enlarged version of Anderson’s original papers, provides a vital textbook wherever gemmology is used or taught. The distinguished gemmologist R. Keith Mitchell has undertaken the editing and has added chapters on the Pye spectrophotometer and on lasers. He has also reproduced new line drawings of spectra in three aspects to accommodate the prism instrument in both the British version and in that favoured by American gemmologists, and in another version as seen through the diffraction grating instrument.Written for gemmologists everywhere and incorporating the latest developments this book will prove indispensable to all engaged in gemstone identification.

The first book devoted exclusively to the spectroscope and its use in gemstone identification. Until 1933 the refractometer and the microscope were the two principal tools in gem testing. Then B.W. Anderson introduced the hand spectroscope which quickly became the third vital instrument for the UK gemmologist. The publication of Anderson's papers in the mid-1950s alerted gem laboratories worldwide to the importance of this instrument. Today its use is universal.Anderson and his lifelong colleague, Payne, both of the world's first full-time gemmological laboratory, were the pioneers in recognizing the vast potential of the spectroscope for this purpose, and The Spectroscope and Gemmology, as the extensively edited, updated and enlarged version of Anderson’s original papers, provides a vital textbook wherever gemmology is used or taught. The distinguished gemmologist R. Keith Mitchell has undertaken the editing and has added chapters on the Pye spectrophotometer and on lasers. He has also reproduced new line drawings of spectra in three aspects to accommodate the prism instrument in both the British version and in that favoured by American gemmologists, and in another version as seen through the diffraction grating instrument.Written for gemmologists everywhere and incorporating the latest developments this book will prove indispensable to all engaged in gemstone identification.

The first book devoted exclusively to the spectroscope and its use in gemstone identification. Until 1933 the refractometer and the microscope were the two principal tools in gem testing. Then B.W. Anderson introduced the hand spectroscope which quickly became the third vital instrument for the UK gemmologist. The publication of Anderson's papers in the mid-1950s alerted gem laboratories worldwide to the importance of this instrument. Today its use is universal.Anderson and his lifelong colleague, Payne, both of the world's first full-time gemmological laboratory, were the pioneers in recognizing the vast potential of the spectroscope for this purpose, and The Spectroscope and Gemmology, as the extensively edited, updated and enlarged version of Anderson’s original papers, provides a vital textbook wherever gemmology is used or taught. The distinguished gemmologist R. Keith Mitchell has undertaken the editing and has added chapters on the Pye spectrophotometer and on lasers. He has also reproduced new line drawings of spectra in three aspects to accommodate the prism instrument in both the British version and in that favoured by American gemmologists, and in another version as seen through the diffraction grating instrument.Written for gemmologists everywhere and incorporating the latest developments this book will prove indispensable to all engaged in gemstone identification.

The first book devoted exclusively to the spectroscope and its use in gemstone identification. Until 1933 the refractometer and the microscope were the two principal tools in gem testing. Then B.W. Anderson introduced the hand spectroscope which quickly became the third vital instrument for the UK gemmologist. The publication of Anderson's papers in the mid-1950s alerted gem laboratories worldwide to the importance of this instrument. Today its use is universal.Anderson and his lifelong colleague, Payne, both of the world's first full-time gemmological laboratory, were the pioneers in recognizing the vast potential of the spectroscope for this purpose, and The Spectroscope and Gemmology, as the extensively edited, updated and enlarged version of Anderson’s original papers, provides a vital textbook wherever gemmology is used or taught. The distinguished gemmologist R. Keith Mitchell has undertaken the editing and has added chapters on the Pye spectrophotometer and on lasers. He has also reproduced new line drawings of spectra in three aspects to accommodate the prism instrument in both the British version and in that favoured by American gemmologists, and in another version as seen through the diffraction grating instrument.Written for gemmologists everywhere and incorporating the latest developments this book will prove indispensable to all engaged in gemstone identification.

First published in 1951, this book is based on a course of lectures on poetry and prose given at Cambridge University during the long vacations of 1946-1950. A request for lectures of this kind came originally from a group of science students and the response was such that a course of this nature ran yearly. The purpose was to provide students from disciplines other than the humanities with the opportunity to feed their interest in English poetry and literature.

First published in 1951, this book is based on a course of lectures on poetry and prose given at Cambridge University during the long vacations of 1946-1950. A request for lectures of this kind came originally from a group of science students and the response was such that a course of this nature ran yearly. The purpose was to provide students from disciplines other than the humanities with the opportunity to feed their interest in English poetry and literature.

16 in. Floor-Standing Teleprompter for DSLR Webcam Smartphone Live Streaming. This teleprompter has an 16 in./40.64 cm high-definition spectroscope with 70% transmittance for clear script display. It supports devices up to 16 in. and can be controlled via an app or Bluetooth remote. Equipped with various lens adapters and clamps, it accommodates different shooting needs.

8 in. Desktop Teleprompter for DSLR Webcam Smartphone Live Streaming. This teleprompter has an 8 in./22.35 cm high-definition spectroscope with 70% transmittance for clear script display. It supports devices up to 8 in. and can be controlled via an app or Bluetooth remote. Equipped with various lens adapters and clamps, it accommodates different shooting needs.

13 in. Floor-Standing Teleprompter for DSLR Webcam Smartphone Live Streaming. This teleprompter has an 13 in./33.02 cm high-definition spectroscope with 70% transmittance for clear script display. It supports devices up to 13 in. and can be controlled via an app or Bluetooth remote. Equipped with various lens adapters and clamps, it accommodates different shooting needs.

10in. Desktop Teleprompter for DSLR Webcam Smartphone Live Streaming. This teleprompter has an 8 in./22.35 cm high-definition spectroscope with 70% transmittance for clear script display. It supports devices up to 10 inches and can be controlled via an app or Bluetooth remote. Equipped with various lens adapters and clamps, it accommodates different shooting needs.

Challenging traditional accounts of the origins of astrophysics, this book presents the first scholarly biography of nineteenth-century English amateur astronomer William Huggins (1824-1910). A pioneer in adapting the spectroscope to new astronomical purposes, William Huggins rose to scientific prominence in London and transformed professional astronomy to become a principal founder of the new science of astrophysics. The author re-examines his life and career, exploring unpublished notebooks, correspondence and research projects to expose the boldness of this scientific entrepreneur. While Sir William Huggins is the main focus of the book, the involvement of Lady Margaret Lindsay Huggins (1848-1915) in her husband's research is examined, where it may have been previously overlooked or obscured. Written in an engaging style, this book has broad appeal and will be valuable to scientists, students and anyone interested in the history of astronomy.

This book contains everything an amateur astronomer needs to know to begin observing whilst going relatively deeply into the subject for those who are already involved. Covers a very wide range of available equipment, from simple DIY spectroscopes to the most expensive commercially-made instruments. Describes basic principles so that the reader understands how to analyse the spectra he/she sees or records. Contributions by leading amateurs astronomers from the USA and Europe.

Timeless, comprehensive coverage of telescopes, mirrors, lenses, mountings, telescope drives, micrometers, spectroscopes, more. ". . . highly recommended for very serious nonprofessional astronomers." — A Guide to the Literature of Astronomy. 189 illustrations. Reprint of 1971 edition.

Challenging traditional accounts of the origins of astrophysics, this book presents the first scholarly biography of nineteenth-century English amateur astronomer William Huggins (1824-1910). A pioneer in adapting the spectroscope to new astronomical purposes, William Huggins rose to scientific prominence in London and transformed professional astronomy to become a principal founder of the new science of astrophysics. The author re-examines his life and career, exploring unpublished notebooks, correspondence and research projects to expose the boldness of this scientific entrepreneur. While Sir William Huggins is the main focus of the book, the involvement of Lady Margaret Lindsay Huggins (1848-1915) in her husband's research is examined, where it may have been previously overlooked or obscured. Written in an engaging style, this book has broad appeal and will be valuable to scientists, students and anyone interested in the history of astronomy.

This comprehensive guide for amateur astronomers provides a brief overview of the development of spectroscopes and an introduction to the theory of stellar spectra, then goes on to examine the spectroscopes available to amateurs as well as how to use them.

8'' Portable Teleprompter Remote for Webcam Smartphone Live Streaming8.8 in TeleprompterSupports Multiple Shooting DevicesRemote ControlEasy InstallationMulti PurposeEasy to Mount and UseControl Mode: Mobile APP, Bluetooth,Supported Focal Length: Wide-Angle Lens over 28 mm,Spectroscope Refraction Ratio: 7:3,Item Type: Desktop,Product Dimensions: 8.07 x 3.82 x 6.73 in/205 x 97 x 171 mm,Supported System: Android, iOS,Spectroscope Size (Imperial): 8 in/22.35 cm,Remote Control Distance: 32.8 ft/10 m,The Farthest Reading Range: 6.5 ft/1.98 m,Item Model Number: TP2A,Spectroscope Angle Adjustable or Not: Not Adjustable,Product Weight: 1.46 lbs/0.66 kg,Style: Without Display,Camera Height Adjustable or Not: Not Adjustable,Software and Hardware Compatibility: APP & Remote Control,Remote Control or Not: Yes,Supported Device Size: support up to 8 in of smart phones or tablets,Main Material: ABS Plastic

10'' Portable Teleprompter Remote for Webcam Smartphone Live Streaming10 in TeleprompterSupports Multiple Shooting DevicesRemote ControlEasy InstallationMulti PurposeEasy to Mount and UseControl Mode: Mobile APP, Bluetooth,Supported Focal Length: Wide-Angle Lens over 24 mm,Spectroscope Refraction Ratio: 7:3,Item Type: Desktop,Product Dimensions: 8.50 x 7.09 x 1.06 in/216 x 180 x 27 mm,Supported System: Android, iOS,Spectroscope Size (Imperial): 8.8 in/22.35 cm,Remote Control Distance: 32.8 ft/10 m,The Farthest Reading Range: 6.5 ft/1.98 m,Item Model Number: TP10,Spectroscope Angle Adjustable or Not: Adjustable,Product Weight: 2.18 lbs/0.99 kg,Style: Without Display,Camera Height Adjustable or Not: Not Adjustable,Software and Hardware Compatibility: APP & Remote Control,Remote Control or Not: Yes,Supported Device Size: support up to 10 in of smart phones or tablets,Main Material: ABS Plastic

13'' Floor Type Teleprompter Remote for Webcam Smartphone Live Streaming13 in TeleprompterSupports Multiple Shooting DevicesRemote ControlEasy InstallationMulti PurposeEasy to Mount and UseControl Mode: Mobile APP, Bluetooth,Supported Focal Length: Wide-Angle Lens over 24 mm,Spectroscope Refraction Ratio: 7:3,Item Type: Floor-Standing,Product Dimensions: 10.24 x 12.60 x 9.45 in/260 x 320 x 240 mm,Supported System: Android, iOS,Spectroscope Size (Imperial): 13 in/33.02 cm,Remote Control Distance: 32.8 ft/10 m,The Farthest Reading Range: 10 ft/3 m,Item Model Number: TP13A,Spectroscope Angle Adjustable or Not: Not Adjustable,Product Weight: 4.96 lbs/2.25 kg,Style: Without Display,Camera Height Adjustable or Not: Not Adjustable,Software and Hardware Compatibility: APP & Remote Control,Remote Control or Not: Yes,Supported Device Size: support up to 11 in of smart phones or tablets,Main Material: Galvanized Sheet