BARD &TATLOCK (LOMDON) LTD. 



4414 



4414 T " Micro-Telescope," suitable for botanical work, etc., in case 



It is usual to look upon the telescope and microscope as instruments varying in use and construction. This 

 useful little invention demonstrates how readily the two may be combined. It has strongly appealed to the 

 public as the " Three Optical Instruments in One," and has been an instantaneous success. It has been extensively 

 advertised, and should be in stock by every optician. 



As a Telescope. It is made of brass, oxydised a semi-dull black finish, which is very neat, and closely resembles 

 vulcanite. Has three draw tubes, cap for object glass and revolving disc for eye-piece, to keep out dust. Closed 

 it is sj ins., and open 15^ ins. long. Magnification over eight diameters. 



As a Microscope. By merely unscrewing and removing the eye-piece cap and tilting the instrument the 

 work of a moment the optical part forming an inner tube, containing all the lenses, except the object glass, 

 can be immediately removed. This inner section is shown in the accompanying illustration. It forms a useful 

 compound microscope, with a magnification ot twelve diameters 



As a Short Distance Glass. Objects at ten feet distance or beyond may be focussed with draw tubes only. 

 To focus objects from ten down to four feet remove eye-piece cap and pull the inner tube shown in illustration 

 forward. Focus is obtained by increasing or reducing the length with the inner tube, according to the distance of 

 the object. A magnification up to about 20 diameters is thus obtainable. 



In this one compact little instrument tbe naturalist has the means of viewing the surrounding country with 

 ease, studying insect, plant and cereal life, and by means of the short distance glass he can study the habits of 

 shy birds and insects, or any other animate life which cannot be approached beyond a certain point. 



10 6 



A4414 



A4414 The Focostat Lens, for botanical and dissecting work. The lens is very powerful and 

 can be set by means of the universal joints to the exact position to suit the observer's 

 eye. Price with needle 



056 



TS^SS 1 



821 



