[9] PROPAGATION OF SCHOODIC SALMON IN 1879-'80. 741 



son's Island, 49°; in stream at our house, just after our return, I find 

 47°. 



On the shore of Sister Islands, in edge of water, I picked up a stone 

 (granite) twice as big as my hand, which, like all the other stones, 

 is covered with an olive-green slimo. I brought it down and on putting 

 it into a dish of water find the slime is a forest of growing plants of sev- 

 eral kinds; in this is a multitude ot living creatures, mostly entomos- 

 traca, a good many slender larvae of insects, several kinds, and halt a 

 dozen arnphipod Crustacea of the common sort, which I take to be Gam- 

 mams fasciatus Say, as per S. I. Smith, in the United States Fish Com- 

 mission 2d Keport, p. 653. Altogether, judging roughly, I should say 

 that there are probably more than 500 animals large enough to be seen 

 with the naked eye on this stone, say 10 Gammarus, 20 gastropod mol- 

 lusks, 100 insect larvae, and 400 entomostraca. The entire bottom at 

 this place, being covered by a similar growth of vegetation, I suppose 

 it is equally well populated with animals. Sandy bottom, or gravel fine 

 enough to be disturbed by waves, is, of course, a less favorable place. 



October 27. — At the dam to-day I could see no indications of spawn- 

 ing. A net was put in immediately above the dam on 21st. (The main 

 net, crossing the stream and barring access to it from the lake at the 

 point where our pounds are to be located, was put in place prior to 

 September 15. This one near the dam is to act as a safeguard and as- 

 sist in the capture of some stray fish between the upper net and the 

 dam.) On the gravels below the dam the fish have begun to dig nests 

 as usual. 



October 29. — To-day we begin setting stakes for pounds above the dam, 

 at the same place as last year, and substantially on the same plans. 

 Shall add some large pounds and locate our spawning-shed there. 



October 30. — Finished nearly all the upper pounds at the spawning 

 place (same referred to on 29th), and put them in shape for catching 

 fish. One male came in during the day. Changed the net opposite the 

 house (in the stream below the dam), putting it up at the head of the 

 run and gravels; have contrived a trap in connection with it, but this 

 is not quite completed. 



At the old-hatching house I found the temperature of the water in the 

 spring to be 47° F. In the feed-trough in the house it is 46A° F. 



At 11 a. m. to-day the volume of water inside the old hatching-house 

 was 17.22 gallons per minute, the several faucets yielding from 2.14 to 

 4.28 gallons per minute. The aqueduct water is not yet admitted, and 

 very little brook water is coming in. 



October 31. — Finished pounds, all except that intended for twice- 

 spawned fish. Also got the trap below the dam on the gravels in order 

 for service. 



November 1. — This p. m. the aqueduct was delivering 3.75 gallons 

 per minute of muddy water of 40° F. temperature. The supply in old 

 hatching-house from other sources amounts to 17.21 gallons per minute 



