xxviii CONTENTS. 



Gesner; Aldrovandus ; Gilbert of Colchester; Variation of the compass; R. 

 Bacon, 583. Opinions of heat ; Drebel ; Harvey ; Circulation of the blood ; Baro- 

 meter ; Bauhins, 584. Ray ; Willughby ; Philosophical societies ; Variation charts ; 

 Electricity, 585. Linnean system ; Discoveries respecting heat ; Theory of mag- 

 netism and electricity, 586. Boscovich ; Hygrometry ; Galvanism, 587. Pile of 

 Volta ; Mr. Davy's experiments ; Dalton ; Rumford ; Leslie, 588. Herschel ; 

 Capillary tubes ; Laplace ; Advantages to be expected from modern institutions, 

 589, 590. Chronological table, to face p. 590. 



ERRATA. 



P. 16, line 31, for " but is " read " but it is." 



P. 160, lines 25, 26, for " immediately " read " immediately." 



P. 255, line 29, for " adjutage " read " ajutage." 



P. 292, line 4, for " wagon " read " waggon." 



P. 390, note, line 3, after " distances" insert " from another star, of the middle 



point." 

 P. 396, Catalogues, insert " Groombridge's Catalogue of Circumpolar Stars, 4to, 



Lond. 1838." 



P. 404, line 24, for " asmosphere " read " atmosphere." 

 P. 505, line 41, for " Franenhofer's " read " Frauenhofer's." 

 P. 582, Une 33, for " indentical" read "identical." 



