50 



SCIENCE-GOSSIP. 



Sanders patent, which has been much improved 

 and developed by the present manufacturers. It 

 consists in outward appearance of an ordinary 



The Photoscope. 



first-class pair of field-glasses and may be used for 

 all purposes required of those instruments. When 

 the user requires to take a picture the photographic 

 attachment (fig. 2, a) is added to the small ends of 



4Bt^ ^pl 



£M>^M 



D C 



The Photoscope. Fig. 2. 



the binocular body (b). This attachment (a) com- 

 bines the lens, shutter and finder. The operation 

 is simplicity itself, for it is only necessary to remove 

 the ordinary eyeheads and slide the tubes of the 



attachment into the tubes of the binocular. The 

 roll-holder (c) contains a spool of film and is 

 screwed into the larger end of the tube, which has 

 the lens and shutter in its opposite end, the 



focussing - glass (d) 

 being fitted into the 

 outer tube, as shown 

 in fig. 2. The 

 whole packs away 

 into an ordinary 

 portable sling case. 

 When operating the 

 picture the glasses 

 are reversed to the 

 eyes (fig. 1). The 

 resultant pictures 

 are charming little 

 photographs, of 

 which we reproduce some examples, they may be 

 enlarged to any reasonable size. Messrs. Ross 

 and Co. have thus produced an instrument which 

 combinesa first-class 

 field or opera -glass 

 with a means of 

 carrying a camera 

 that will give us 

 permanent records 

 of the incidents of 

 travel or of nature 

 notes we may desire 

 to record. 



The photoscope 

 will do all that may 

 be expected of the 

 hand camera, with 

 the advantage that positions may be worked in 

 which no other instrument would be available. 

 As the photoscope is held to the eyes whilst the 

 picture is taken, a more 

 natural position' is the 

 result. Each roll of films, 

 to be used as negatives, 

 contains sufficient for 

 twenty-four exposures, 

 the pictures measuring 

 ii inch by ig inch square, 

 the price being one 

 shilling and sixpence for 

 each roll. These are 

 very portable, and may 

 be developed and printed 

 at leisure. For those 

 persons who have not 

 Messrs. Ross and Co. 

 charge two shillings per spool of films for develop- 

 ing, and from one shilling and sixpence to two 

 shillings per dozen 

 for printing the 

 pictures. There are 

 few students of 

 nature who would 

 not find the photo- 

 scope useful for one 

 or other purpose in 

 connection with 

 the permanent re- 

 cords of their in- 

 vestigations. 



The price of the 

 photoscope varies 



from £y 10s. to /io 10s. For those who have 

 already valuable binocular field-glasses, arrange- 

 ments may be made for fitting them with the 

 attachments for photography. 



opportunity themselves, 



