Popular Science Monthly 



199 



Teaching the Proper Care of Forests 

 by Object Lesson Models 



THE right and the wrong way to cut 

 timber is shown by realistic models 

 which the Forest Service has had prepared 

 for exhibition purposes throughout the 

 country. Three models are included in the 

 series. The first shows a stand of one acre 

 of virgin timber, an actual scene in one of 

 the national forests that has been repro- 

 duced on a small scale with great accuracy 

 both as to proportion and coloring. 



The second of the series shows the same 

 stand after a timber sale conducted in 

 accordance with the regulations, of the 

 Forest Service. The matured trees have 

 been felled and cut into lengths which have 

 been arranged in systematic piles to facili- 

 tate their removal from the forest. All of 

 the brush and small limbs, which, if left on 

 the ground would constitute a fire hazard, 

 have been arranged in compact piles in 

 readiness to be burned under the watchful 

 eyes of foresters. 



The third of the series shows an example 

 of the wrong way to cut timber. Logs of 

 various lengths are seen scattered about, 

 no attempt having been made to arrange 

 them in piles. Some of the trees felled 

 have not been cut into lengths; many 

 have been cut down without regard to 

 size or maturity. All of the cut timber 

 and the trunks of the standing trees are 

 charted and the condition of the ground 

 indicates that the forest has been burnt 

 over, the inference being that careless 

 methods on the part of those engaged 

 in cutting out the timber have resulted 

 in the spreading of a forest fire which 

 might otherwise have been checked. 



The Forest Service has two 

 sets of these models. One 

 which shows a stand 

 of Western yellow 

 pine, is utilized for 

 the western section 

 of the country; the 

 other, depicting a 

 typical forest 

 scene in the 

 southern Appa- 

 lachian region, 

 for the eastern 

 section. 



The three mod- 

 els are exhibited 

 in connection with 

 lectures on forest 

 preservation. 



One of a series of models used by the United States 

 Forest Service to show how timber should be cut 



The helmet keeps the wearer alive by draw- 

 ing its supply of fresh air from next to the floor 



A New Helmet for Use in Smoke 

 or Gas-Filled Chambers 



THIS is not a gas mask such as is used 

 in European trenches. It is a new 

 helmet which the British Government has 

 installed on five hundred battleships to be 

 used below the decks when entering gas 

 or smoke-filled compartments. It is also 

 being introduced in America, in city fire 

 departments. 



When used in smoke or gas-filled rooms 

 this new helmet draws its supply 

 of fresh air from next to the floor, 

 taking advantage of the well known 

 natural law that heat, 

 smoke, fumes, etc., 

 rise, leaving a cer- 

 tain amount of ox- 

 ygen close to the 

 floor. The trailing 

 hose of the new 

 helmet seeks that 

 cushion of fresh air 

 next to the floor. 

 The helmet 

 weighs only four 

 pounds. One 

 size is adjustable 

 to fit a man, 

 woman or child. 



