NA TURE 



[October 5, 1905 



REYNOLDS & BRANSON, U., 



Chemical and Scientific 



Instrument Makers, Laboratory 



Furnishers & Manufacturing 



Chemists. 



Special Apparatus 



for 

 Consterdine and 



Andrews' 

 " Practical 



Arithmetic." 



DESCRIPTIVE LiST POST FREE. 



14 COMMERCIAL STREET, LEEDS. 



CARL ZEISS, 

 JENA. 



BRANCHES- 

 LONDON— 29 Margaret Street, Regent Street, W. 



Berlin. Franlcfort o/M. Vienna. Hambure. St. Petersburg. 



Suitable for Every 

 Class of Scientific 

 and Technical 

 Research. 



PHOTO- 

 MICRO^APHIC 



PROJECTION 

 APPARATUS. 



Wnl& for Illustrated Catalogue ' 

 free on application. 



post 



BROGA GALVAN 



A suspended-needle instrument which is 

 almost perfectly astatic. 



Of far higher sensibility than galvano- 

 meters of the suspended coil type. 



Almost uninfluenced by stray magnetic 

 fields. 



Sensibility adjustable through a wide 

 range by raising or lowering the tiny controlling 

 magnet. 



The coils exchanged in a few moments for others 

 of different resistance. 



Price of Broea Galvanometer, complete, as illustrated, 

 with one pair of Coils (Resistance about 50 ohms, unless 



otherwise ordered), £7 lO O 

 Extra pairs of Coils (Resistance about 4 ohms or 1600 i 



ohms), per pair I5s. 



PJROMPT DELIVERY. 



THE CAMBRiDGTsGIENTIFIC INSTRUMENT 



Tliis is lienre/'ofivord out- otilij atldres'i. 



