Genet’s Memoriat. 339 
J (a= Jr? —x*) 21.92 
; a= Jr? —a? 
¥ luxions, and equating=0. Hence we have a general ex- 
pression for the three points.* 
A. B. Quinsy. 
xx into 
fermined by putting py 
August 4, 1826. 
* The shackle-bar on board the steam-boat Chancellor Livingston, on the 
Hadson river, is 150 inches long, and the crank 30 inches. By applying the 
produce rotation when the crank is 78° 26' ‘from the upper dead point. 
The angle made by the crank and shackle-bar at this time, is obtuse. 
Art. XV.—Preface to Experiments and application to Me- 
chanical Industry of the upward force of Fluids. ( Genei’s 
Memoria!.) By Freirx Pascatis, M. D., President of 
the American Branch of the Linnzan Society of Paris, 
&e. & 
Tr is often the case, in this age of much writing and print- 
ing, that Reviewers, or Editors ef Journals, have the exclu- 
sive power to establish the reputation of an author, if they 
choose, or to deliver over his book to neglect and contempt. 
They may also raise a work much above its true merit and 
value. From this result there is not much harm, because 
public opinion must finally decide and award justice to the 
author. There is still a degree of retardation to the progress 
of science, of taste, or of other desirab e improvements ; but 
what is worse, is the fallen fortune of a book in the market. 
When it has once been lowered in the hands of wholesale or 
ili i can be well restored; and what 
either praise or censure. : | 
To these observations I was led, by reading, lately, much 
incorrect criticism, and many unfounded remarks, against 
Mr. E. ©. Genet’s Memoir on the upward forces of Fluids, 
