August 31, 1965] 



^tA tURB 



WAVE-LENGTH SPECTROSCOP: 



(LARGE MODEL.) 

 Measures wave-lengths direct to an accuracy of 1 Ang-strdm unit (one ten-millionth 

 of a metre) from W.L. 3888 to W.L. 7724. 



SPECIAL ADVANTAGES. 





■ipiiiiiiii 



The Collimator and Telescope are 

 rigidly fixed at right angles, thus the 

 instrument will stand in a corner, is always 

 ready for use and in adjustment. 



The wave-lengths can be read off by the 

 observer without moving from his place. 



The object glasses and prism are large 

 (iV' clear aperture), which enables the 

 faintest visible lines to be seen. 



The eyepiece has a bright pointer for 

 measuring the W.L. of bright lines on a 

 dark field. 



Means are supplied of very simply 

 setting the Zero, although on account of 

 the great rigidity and careful constructior. 

 throughout it may be used for many 

 months without any setting being needed. 



RTiRJSIL MILGER, Ltd., 75a Camden Road, London, N.W. 



AWARDED GOLD MEDAL ST. LOUIS EXHIBITION, 1904. 

 Telrgi-apliic Aililnsx .— •• Siiheriiiti), l.oniloii.-' 



ILLUSTRATED LIST ("A") OF SPECTROSCOPES AND SPECTROSCOPIC ACCESSORIES 

 GRATIS ON APPLICATION. 



BURTON'S GEOMETRIC 



LEVELLING STAND 



for supporting any apparatus requiring 

 to be accurately levelled. 



The stand rests on three solid toes, either on the bench or 

 llocr, or upon a pile of Boys' Geometric Tripod Stands (larger 

 size). A geometric gimbal construction provides two inde- 

 pendent levelling adjustments about axes at right-angles to one 

 another. The mahogany top is 30 x 30 cm. 



IMMEDIATE DELIVERY. 

 I»i?ice J31. 



The Cambridge Scientific Instrument Co., Ltd., 



CAMBRIDGE, ENGLAND. 



AWARDED MEDALS WHEREVER EXHIBITED, 



including 9 at the qreat P.iris Exposition of looi. 



JAS.J. HICKS, 



WHOLESALE MANUFACTURER OF 

 SCIENTIFIC AND CHEMICAL APPARATUS 



WAR OFFICE, INDIA OFFICE, ADMIRALTY, 



ROYAL COLLEGE OF SCIENCE (LONDON), 



GOVERNMENT LABORATORY, 



MANCHESTER SCHOOL OF TECHNOLOGY, &c., &C. 



THERMOMETER. 



ANY KIND OF SCIENTIFIC INSTRUMENT MADE TO ORDER. 



Prompt Attention to all Orders and Inquiries. 

 fi*- EXCEPTIONAL TERMS TO COLIECES, INSTITUTIONS, &C 



Qiiolal,\n,ss„l',intl,:i far I.alvratoiy Out/its or .Si:l,^l€ Inityunicuts. 



THERMOMETERS FOR STUDENT WORK A SPECIALITY. 



Catalogues Post Free. (State which required.) 



8, 9. & 10 HATTON GARDEN, LONDON. 



