Popular Science Monthly 



225 



It 



A 



Looks Like a Telescope, but 



It's Really a Camera 

 CAMERA that can be used for 

 taking photographs without the 

 s u b j e c t's 

 knowledge, 

 resembling in 

 appearance a 

 short tele- 

 scope, has 

 been brought 

 out in E u - 



fm 



This camera 

 looks like a small 

 telescope, but 

 takes snapshots 

 directly at right 

 angles to the 

 apparent line of 

 vision of the 

 photographer 



rope, in spite of the 

 war's absorbing inter- 

 est. A lens almost 

 invisible is located in 

 the side of the tele- 

 scope so that the 

 photographer, point- 

 ing what appears to 

 be a telescope at some dis- 

 tant object, can get snapshots 

 of objects that interest him, 

 directly at right angles to his 

 apparent line of vision. 



The lens is equipped with 

 an adjustable shutter, so that 

 snapshots or time exposures 

 can be made. For tourists 

 traveling in foreign lands, such an 

 equipment would be of considerable 

 value, as natives often spoil photo- 

 graphs by unnatural posing and va- 

 cant staring, and this little camera 

 would throw them off their guard. In 

 Europe they call these contrivances 

 "detective" cameras, probably because 

 no detective ever carried them. The 

 accompanying illustrations show snap- 

 shots obtained without the knowledge 

 of those in the picture. 



What Is the Best Shade Tree in th« 

 United States? 



THE prize for the largest shade 

 tree in the United States was won 

 by a sycamore tree in Worthington, In- 

 diana, which the judges of the Ameri- 

 can Genetic Association found to have a 

 circumference of forty-three feet, and a 

 height of one hundred and fifty feet. 

 This interesting incident calls attention 

 to the fact that foresters are recom- 

 mending the sycamore very strongly for 

 city planting. They tell us that long 

 experience with sycamores planted in 

 city streets and on lawns has shown 

 that the species is very well adapted 

 to withstand the smoke, dust and 

 gases so common in cities. Besides, 

 the sycamore is very resistant to the 

 attacks of insects and fungi, and 

 grows rapidly. At ten 

 years of age, a healthy 

 sycamore is large 

 enough for shade as 

 well as for decorative 

 purposes. Indeed, in the 

 latter respect, it is not 

 exceeded by any other 

 Eastern species. Its 

 mottled bark, its full, 

 rounded crown, and its 

 dense foliage, impart a 

 very handsome and 

 striking appearance to 

 any lawns or boulevards 

 which are fortunate 

 enough to dis- 

 play these mag- 

 nificent trees. 



The sycamore 

 ranks with the 

 oak and hard 

 maple as a dec- 

 f)rative tree. 



The new camera 

 is especially val- 

 uable for securing 

 natural pictures 

 of persons who 

 would pose and 

 stare, or else run 

 away, if a camera 

 were pointed at 

 them 



