Popular Science Monf/ili/ 



47 



A^ 



Tilting End-Pieces for Your 

 Eye Glasses 



RE you one of those unfor- 

 tunates who are compelled 

 to go through life with spec- 

 tacles before their eyes 

 If so, a clover little device 

 recently patented, 'a ill bo 

 of interest to you. The 

 device consists of a fric- 

 tion hinge connecting 

 the end-pieces with 

 the lenses in such a 

 manner that by a 

 slight turning of the 

 frame of the glasses 

 the lenses may be 

 brought 

 into any 

 angle rela- 

 tive to the 

 eyes and 

 held in 

 that po- 

 sition as 



long as it is desired. The new end-pieces 

 are simple and have no parts that will get 

 out of order. 



Remarkable Pliotoftraph of an 

 Actual Battle Scene 



ONE of the most remarkable 

 war photographs taken by 

 the official photographer of 

 the British army in France 

 is reproduced in the ac- 

 companying picture from 

 the excellent enlargement, 

 eight by fifteen feet in 

 size, which was recently 

 placed upon exhibition. 

 This picture, probably 

 the largest war photo- 

 graph ever made, shows a 

 wide portion of the battle- 

 field during the actual ad- 

 vance of the Canadian 

 troops at Vimy Ridge, on 

 the morning of April 9, 

 1917. The smoke in the 

 background is produced by 

 the counter-barrage of the 

 Germans, which was par- 

 ticularly aimed at a line of 

 tanks. The Canadian curtain of fire has 

 already swept over the battlefield and is 

 no longer visible. 



An adjustable 

 spectacle rim for 

 tilting the lenses 

 to a desired angle 



Dderwood and Underwood 



This is probably the biggest enlargement ever made of a photograph. It shows the Canadian 

 advance at Vimy Ridge and measures eight feet in height and about fifteen feet in width 



