206 



der the direction of the Hon. Christopher Morgan, Secretary of 

 State. By E. B. O'Callaghan, M.D. Vol. III. Albany, 1850. 

 8vo. — From the Regents of the University of the State of New 

 York. 

 Sixty-fourth Annual Report of the Regents of the University of the 

 State of New York. Made to the Legislature, March 1, 1851. 

 Albany. 8vo. — From the same^ 



Professor Frazer announced the death of Joel B. Reynoldsj 

 a member of this Society, who died on the 16th May last, in 

 the 25th year of his ao;e. His death was occasioned by the 

 explosion of a steam boiler. Prof. F. described the circum- 

 stances of the melancholy accident, and accompanied the an- 

 nouncement with a notice of the scientific pursuits and merits 

 of the deceased. 



Mr. Justice announced the death of Mr. Wm. Hembel, a 

 member of this Society, who died on the 12th of the present 

 month, in the 88th year of his age. 



The following letter from Ur. Locke, on the subject of a 

 new method of recording time and astronomical observations 

 on the register of an electro-magnetic telegraph, was read, and 

 a specimen of the work shown. 



Cincinnati, June 3d, 1851. 



To the American Philosophical Society. 



Although I have for some time ceased to correspond with your 

 learned institution, yet I have not ceased to labour in my small way 

 for the advancement of those objects which are interesting to all of 

 us. I have lately been engaged in polishing up my chronographic 

 invention of 1848, especially as regards cylindrical registering of as- 

 tronomical observations, with reference to local or fixed observatory 

 operations. I announced last autumn, in the National Intelligencer, 

 my method of regulating the cylinder or the equatorial clock, by 

 means of electro-magnetic power derived from the sideral clock, and 

 acting in aid of a weight. By this means the cylinder or clock, ad- 

 justed to a rate perceptibly too slow, receives a supplementary power 

 by consecutive impulses, equalized by an intermediate spring, and 

 resulting in a measured motion of great uniformity. During the win- 

 ter I devised a new mode of working the electro-telegraphic register- 

 ing upon the cylinder. This will be best understood by adverting to 

 the Morse register, in which the fillet of paper passes snugly over a 



