478 ANNUAL RECORD OF SCIENCE AND INDUSTRY. 



yards of levee at forty cents per yard, reaching a total of 

 $40,000,000. 



jesty's axti-fouling compositiox. 



The copper sheathing of two royal English yachts was 

 covered in the fall of the year, by order of the Admiralty, 

 with Jesty's Anti-Fouling Composition, and, after remaining 

 moored in the harbor until the end of the following April, 

 they were found as free from algae and other deposits as 

 when first coated, except in very small patches near the 

 rudder. 14 (7, CCXIII., 1874, 257. 



HYDRAULICS IN THE ADIRONDACK PLATEAU. 



At a recent session of the New York Legislature a survey 

 of the Adirondack plateau was authorized, to determine the 

 probable cost of accumulating a reserve of the surplus waters 

 of that region for the use of the Hudson and other streams. 

 This was placed in charge of Professor T. N. Benedict, of 

 New Jersey (formerly of Burlington, Vt.), who has spent 

 much time in the study of the plrysical and topographical 

 character of the region. The instrumental work was per- 

 formed by two parties, one under Professor Benedict, and 

 the other under Mr.W. B. Cooper. Professor Benedict took 

 charge of the lakes and ponds of the upper sources of the 

 Hudson, including a part of the Racquette River, while to 

 Mr. Cooper's party was assigned the triangulation of Long 

 and Forked Lakes, and the examination of the Racquette 

 Valley below Long Lake. The gauging of the main channel 

 of the Hudson, above the junction of the Mohawk, was ac- 

 complished in October by Professor Benedict. 



As the result of these inquiries Professor Benedict reports: 

 first, that immense quantities of water can be safely stored at 

 a comparatively low percentage of cost on the upper Hudson, 

 most of which is now worse than lost, as it runs to waste in 

 spring freshets, which in various ways are the cause of much 

 damage; second, that this excess is sufficient to maintain the 

 deficiency of the main river, at low summer stages, for 100 

 days, after liberal discount for losses on its passage. The lakes 

 of the Racquette basin, alone, are alleged to have a capac- 

 ity more than six times that of the Black River reservoirs, 

 which supply the eastern division of the Erie Canal. 



