1-27-2 



Journal of Applied Microscopy 



been found the year previously, and 

 to determine the microscopical life 

 of the waters in comparison with 

 those of Sin-yale-a-min lake. The 

 view shown in Fig. 4 will give to 

 the mountain lovers an idea of the 

 beautiful peak that was always be- 

 fore us. This peak, McDonald, 

 rises to a height of over ten thousand 

 feet. The view here given was taken 

 from the mountain side near camp. 

 Photographers may be interested in 

 knowing that the picture was taken 

 on a Seed orthochromatic plate, the 

 exposure being a fiftieth of a second. 

 The plate was somewhat under ex- 

 posed, but for the purpose desired, 

 which was to bring out the peaks 

 with the clouds above, the effect was 

 successful. 



McDonald lake is much similar 

 to Sin-yale-a-min lake. The length 

 is about a mile and a quarter, the 

 width less than a quarter, the depth 

 68 feet. Sin-yale-a-min lake was 

 some longer, considerably wider, and in the deepest -")0 feet. McDonald lake 

 is surrounded on all sides by high and rugged mountains, save at the west, where 

 a moraine has made a dam as in the case of the lake before mentioned. 



Work at this lake was conducted much as in the first case. The microsco- 



FIG. 4. McDonald PEAK AND LAKE. 



FIG. 5. ORNITHOLOGISTS AT WORK AT McDONALD LAKE. 



