and Laboratory Methods. 



1277 



FIG. 11. A FLASH LIGHT AROUND THE CAMP FIRE. 



to combine work with recreation. This is especially true of teachers who wish a 

 change, and are seeking a place where they may have a chance to work, and 

 when work is over have a little enjoyment. During the first summer the number 

 of plates exposed within a couple of miles of the station amounted to several 

 hundred. There were more than 

 a half dozen cameras, and they 

 were in almost constant use. The 

 dark room was in use most of the 

 time both day and night. During 

 the second season the number of 

 exposures was still greater. The 

 rapids above the station are a de- 

 light to the eye, a pleasant place to 

 roam when there is nothing to do, 

 and a great resort for the fisher 

 men. The lake beach is beauti- 

 ful, and many romantic bits of it have been taken. The number of illustrations 

 accompanying this paper is already too large, or more would be shown. It is suffi- 

 cient to say that the writer brought home from the summer's trip, including the 

 work at the station, more than a hundred and twenty-five good negatives, each 

 illustrating something in geology, physical geography, or biology. 



Bathing in the lake is excellent. The bottom is smooth and sandy, and any 

 depth desired may be obtained. The water is usually comfortable, the cold 

 water from the rivers not reaching this portion of the lake. 



Figure 11 is given as an illustration of an attempt to take a flashlight of a 

 group around the camp fire at night. The magnesium was placed in a tin pan 

 with a paper between the powder and the pan, the paper trailing outside so as to 

 give a chance for lighting. The pan was placed on a bench with a tent as back- 

 ground. Nearly an ounce 

 of magnesium was found 

 necessary to produce a satis- 

 factory picture. The camera 

 was placed, and the person 

 in the middle of the group 

 was given a candle, which 

 was used to determine when 

 a sharp focus was obtained. 

 By giving the candle to the 

 party at one end, then trans- 

 ferring it to the other end, a 

 suitable arrangement was 

 had. The shutter was 



FIG. 12. AN EXPERIMENT IN REARING DRAGON FLIES. ^ u 4- 4.U 4.- iU 



opened about the time the 

 trail of paper was lighted, after which the operator walked around and took a 

 place in the group. After the flash he returned to the camera, closed the shutter, 

 and later made development. On this occasion there was enough smoke to 

 make part of the picture a trifle hazy. 



