18 REPORTS OF THE DEPARTMENT OF COMMERCE, 
MUSSEL PROPAGATION, FiscaAL YEAR ENDED JUNE 30, 1918—PoINTS oF DEPOSIT 
AND SPECIES OF GLOCHIDIA PLANTED. 




+ New Bos- 4 
: Fairport : 
: Fairport, t+ | ton, Mis- Lake Black 
Species. Pokegama Missiesp? sissippi Pepin. River. 
5 River. 
Yellow sandshell (Lampsilis anodontoides) ..|.....seeee-2| 3,547,900 | 4,548,000 |..... Sieceph lec ose sees 
Mucket (Lampsilis ligamentina) .......---.|..---0-e-0- 11, 758, 850 | 26,687, 400 |........-.-. 19, 296, 500 
Butterfly \(Plagiola securis ese. abe caewedele.ceeesaeeee 38; 800) | SE 2 ioe). na eens Selene © | seem te eee 
Lake Pepin mucket (Lampsilis luieola) . aw] 30, 417, 700 65; 0000 | Saee- ecm 91, 226, 800: |... =~... 
Totals = 35s ASE. shh ect castes 30, 417, 700 | 15, 410,550 | 31, 235, 400 | 91,226,800 | 19, 296, 500 
‘ Cumber- S 
: White Lake Ohio 
Species. se land fst Total. 
River. icc: Keokuk. River 
Yellow sandshell(Lampsilis anodontoides) . . 11, 000 15, 500 149 DOOR. ico ae &, 271, 600 
Mucket (Lampsilis ligamentina)....-.. se Sse 1,797,000 | 2,338, 500 248,000 | 5,925,100 | 68, 051, 350 
Butterfly (Plagioia securis)..........---.+6 518,000: |:..25. 528228 34, 000" Cds<8 tokses jy 
Lake Pepin mucket (Lampsilis luteola)....|..-...-----e|sccccceccces 9 107, 200s) sonra eemes 131, 416, 600 
Black sandshell (Lampsilis recta)....-...-. NGS Geo tl accescnosuec 225000) Saeeemoeenete 137, 825 
Pocketbook (Lampsilis ventricosa).....-.-. 664,450) 1h; eo sei ruler ery: ee SEE sae €64, 650 
Tota [OA eee FAS I SELES 3,105,975 | 2,354,000 | 10,160,800 | 5,925,100 | 209, 132, 825 
INVESTIGATIONS AND EXPERIMENTS REGARDING AQUATIC 
PRODUCTS. 
MODIFICATION OF THE SCIENTIFIC WORK. 
The conditions of war have necessarily led to marked modifications 
of the Bureau’s general plan of scientific work. Efforts have been 
devoted primarily to such studies or practical experiments as could 
be expected to contribute promptly to the increase of the supply of 
food or other useful aquatic products, but there has been no exclusion 
of biological and chemical investigations which have to do chiefly 
with our preparation for meeting the problems that will confront the 
Nation after the war. An outline of the scope of the chief investiga- 
tions and other work appropriately associated with the scientific in- 
quiries, and in some cases the actual results obtained, are briefly 
summarized. 
EXPERIMENTS RELATING TO THE. PRESERVATION OF FISHERY PRODUCTS. 
An important phase of the Bureau’s scientific work is the solving 
of problems in the preservation of fishes for food. No more useful 
service for the prevention of waste and the promotion of the use of 
aquatic foods can be rendered than by ascertaining the conditions 
leading to spoilage of fresh and cured fish and by discovering more 
effective methods of preservation. Especially is it important to find 
means of treatment or of preservation which are suited to the fishes 
that can not be adequately utilized by old methods or are adapted to 
climatic or transportation conditions under which the common 
means of preservation fail of their purpose. 
Principal among investigations of this character are the experi- 
ments in the preservation of fresh fishes by methods of desiccation. 
