40 REPORT OF COMMISSIONERS OF INLAND FISHERIES. 
The description of the apparatus used is briefly as follows: 
A series of bags made of scrim was sunk into the water and held - 
securely in place. In each bag, near the bottom, was placed a 
two-bladed rotating fan resembling that commonly in use over 
restaurant tables. These fans or propellers were connected with 
vertical shafts, which in turn were geared up to a gasoline engine. 
When the. machinery was set in motion, the rotation of the fans 
created a continuous current of water, directed upward from the 
bottom of the bags. The force of the current could be controlled 
readily by various simple means, such as altering the angle of the 
blades. 
The credit of planning and constructing the apparatus in detail 
belongs to Mr. George H. Sherwood, who has submitted the fol- 
lowing description : 
“The apparatus may be described as consisting of two parts: A, the 
ear or bag (with its supporting framework) used for holding the fry; B, 
the mechanism (propeller, belts, shafting, etc.) for stirring the water. 
“A. The Car or Bag. 
“The requirements of the car or bag were : 
“1, That it should allow for abundant circulation of water from the 
outside. 
9 Jt should have as few corners and pockets as possible. 
“3. It should be fastened so that it could be readily changed and 
cleaned. 
“4. Jt should be rigid enough to keep its walls from the propeller or 
fan. 
“Galvanized wire netting was first suggested as the most suitable 
material for the car. This was soon abandoned, because it is so liable to 
breakage, and because it was feared that the current of water might carry 
the young lobsters against the rigid metal and fatally injure them. The 
scrim, such as was used for the experiments of last year, was considered 
more practicable. It would permit free circulation, was comparatively 
inexpensive, and could easily be cleaned. The only difficulty connected 
with its use was keeping the cloth free from the propeller blades. 
“Size and Shape of Bag.—From this material was made a cylindrical 
bag a little more than three feet in diameter and forty inches deep—the 
