116 Scientific Intelligence. 
with iodid of ethyl yields, among other products, butyric ether from which 
the acid may easily be obtained. The reaction by which butyric ether 
}C 
is obtained may be expressed by the equation C< H Cols t sik 
O i 
OC,H, 
C,H 
C{C({H  +Nal. By the action of iodid of methyl upon disodium- 
| 
| OC, 
acetic a the authors obtained an acid also identical or isomeric with 
Na if CH, 
CiNa CH | C4 CH, 
butyric acid, the reaction being C ollie sell f=et H 
OC, a 60, H, 
+2Nal. The authors leave it for the relent undecided whether sci 
having the formula of butyric acid, obtained by different processe 
identical or only isomeric. By the action of iodid of ethyl upon deodiahe 
acetic ether the authors obtained an ether isomeric or identical with — 
capronic ether, Chemists will await with impatience the completion of 
this investigation, proiesng, as it does, to lead to results of the greatest 
theoretical interest.—-Ann. der Chemie und Pharm., lix, p.217.  w. & 
8. On the heat of friction; by Prof. Jostan Bed Cooxz, Jr. (Proc. 
of the Amer. Acad. of Arts and Sci., vi, rs aie 65).—An accident to 
on of the large turbine wheels empl oyed b y ie Merrimack Manu 
ng Corporation of Lowell has furnished a most remarkable illustra- 
ei of the modern mechanical theory of heat, and through the kind- 
ness of Mr. Isaac Hinckley, the accomplished agent of the Corporation, 
I have the pleasure of bringing the facts to the notice of the Academy. 
I cannot do better than to begin by reading Mr. Hinckley’s own state- 
ment, in 1 a lett tter addressed to me, dated December 30th, 1864. The 
dranlic Experiments, which you will find in the College Library. Our 
turbines are similar to the Tremont turbines therein shown. ee 
“ The turbine of which these pieces were a part is one of 250 H. P _ 
under a fall of 32 feet, us ing ft. of water per secon 
velocity of 144 revolutions per minute. Its position is horizontal, an¢ 
at a level of 3 feet below the surface of Merrimack River at its ordinary 
stage. It is mounted upon a vertical wrought-iron shaft 25 feet Jong 
