and Laboratory Methods. 



1271 



FIG. 3. 



FIELD TABLE AT SIN-YALE-A-MIN LAKE, 

 FOR MICROSCOPICAL WORK. 



loaded as it was when used for actual work, with two occupants in addition to 



the material. At the front is seen the pump after plans by Ward, for taking ento- 



mostraca and other fresh water species. Hanging over the side of the boat is 



the net after plans by Kofoid, for straining the pumpings. To the right of the 



net is to be seen the apparatus for 



measuring depth, which is an in- i -» -• -^-^ 



strument used in electric light 



plants and other establishments for 



measuring wire. The rubber hose 



for attachment to the pump is also 



seen. Of this hose one hundred 



and forty feet were carried. 



The canvas boat was used con- 

 tinuously, and is about the only 

 available means for work in these 

 mountain lakes, so remote from 

 civilization, where transportation 

 is a grave problem. It was neces- 

 sary to use common garden hose, 

 owing to the fact that no other kind 

 was kept in stock, and owing to the 

 further fact that large hose and a 

 large pump would be too difficult to handle. 



In Fig. 3 is shown the laboratory table of the microscopist in his study of the 

 entomostraca and other forms. This consists of two sticks nailed to a fir tree at 

 the desired height, and a couple of rough boards nailed to the top of these sticks. 

 The location is selected in the shade, so that it is always comfortable. The lake 

 is at an altitude or oS(l() feet, and the cold water makes the surrounding air cool, 

 so that when one is in the shade one is always comfortable. Unfortunately the 

 microscopist was not aware the picture was being taken, and while the lower part 

 of the body shows, the upper part is lacking. As this happens to be the only 

 negative worth saving, the picture is shown to illustrate the ingenuity in making 

 a table. The eye of the naturalist will readily take in the situation, working at the 

 fresh material from a lake never before visited, with the beautiful sheet of water 

 but a few feet away. 



In this work a small microscope was carried, with a battery of objectives, and 

 a few necessary stains, dishes, slips, covers, and the like. The material could 

 be taken from the water and studied immediately. It may be well to say at this 

 time of the year, July, rain seldom falls, so there is little difficulty from that 

 source. When there was danger, or when the sun was too hot, a tarpaulin was 

 made into a roof with ropes, which answered as protection. In case of emer- 

 gency it required but a few minutes to put all the material under cover of the 

 tents. 



A similar camp was made at McDonald lake, about fifteen miles further north, 

 in the same range, and in the same reservation. The camp at this lake w^as for 

 the purpose of collecting additional material in shells, of which a new species had 



