CONTENTS. 



Oil Crystallography . . . . 64, 96, 210, 289, 349, 455 



jin Account of a Melkod of dividing astronomical and 

 other IiifitruinenlSy hy 0C2/lar Inspection ; in which the 

 vsual Tools for graduating are vat employed ; the 

 ^ whole Operation being so cojitrived, that no Error can oc- 

 cur lut what is chargeable to Vision, when usiisied by the 

 best optical Means of viewing and measuring viinute 

 Quantities '81,163 



Suggestion for establishing a Telegraphic Inteixourse be- 

 tween London and Dublin 1 24 



u4 concise Abstract of Professor Mitchill's Discourses on 

 Mineralogy , the sixth great Section of the Co?irse of 

 Natural History which he delivers in the new Institution 

 at New York 125 



Account of the /internal Exhibition of the Acetate of Lead 

 in several Diseases 1 29 



On the Use of Fumigations in Army Hospitals . . 132 



Meteorological- Observations on a Thunder Storm; with 

 some Remarks on Medical Electricity I6I 



Report made to the Institute on two Memoirs of M. 

 Gratien Lepere, Engineer of the Imperial Roads 

 and Bridges, on natural and artificial Puzzolano. By 

 jV. Chaptai 17s 



On tkt- Causes which have operated in the Production of 

 Valleys 1 90 



Further Remarks on Thunder Storms 201 



On tlie Date of Ike application of Telescopes to astro- 

 nomic Inslruments ; the Time ivtien Astronomers first 

 observed the Stars and Planets in the Day-time by means 

 of these Telescopes ; and on the Author of these Dis- 

 coveries. Translated from the French of M. Dk Fouchy 



. . • 241 



yl Description of a new Anemometer 247 



CoimogonyoJ the Iroquois, or Five Indian Nations (f Canada 



261 



On the Breeding of Fish ^ and the Natural History of their 



Generation '268, 324 



On 



