Kezu Publication. 279 



the bulk of thefe enormous manes, by grinding one piece 

 againft another, and bv undermining and wailiing away 

 thofe parts that lie expo fed to the furge ; and more ice may' 

 be deftroyed in one (lenny feafon than is formed in feverui 

 winters, and its accumulation thus prevented." 



This evidence clearly proves that the fun's influence at the 

 poles, fo far from being equal to produce a conftant and uni- 

 form effect, creating an impulfe extending its effect to the 

 remoter!: parts of our globe, and a daily elevation of feveral. 

 fx-et to the waters of the ocean, is not fufficient in the hottcll 

 period of fummer to diffufe a fenfible thaw ; and thus we arc 

 convinced that a few plain and fimple facts are of much 

 greater avail than a multitude of fanciful conjectures. 



NEW PUBLICATION. 



A Manual of a Courfe of Chemiflry ; or, a Series of Experi- 

 ments and Illnf rations neccjfary to form a complete Courfe 

 of that Science. By J. B. Bouillon Lagrange, 

 Profejfor in the Central Schools of Paris, &c. Tranflated 

 from the French, with 17 Plates. ' 2 Vols. 18 Shillings. 

 Cuthel, and Vernor and Hood, 1800. 



w. 



E have perufed this work with much pleafure. It is 

 compreherrfive, though concifej and the manner in which 

 the author treats his fubject is well calculated to give to thofe 

 who wifli to ftudy chemiflry, not only a knowledge of the 

 theory, but alfo, which ought to be the chief aim of every 

 .work of this kind, of the procefl'es and manipulations as 

 applicable to the arts and the common purpofes of life. 



The apparatus employed in modern chemiflry is defcribed 

 with considerable accuracy and clearnefs, and illuftrated wiih 

 appropriate engravings; but in the original, the connexion and 

 relation of all the parts, though very correctly given in out- 

 line, are not fufticiently apparent and obvious, efpecially to 

 tyros. The Englifh publishers have done jufticc to the work, 

 and even a fcrvice to the fcience of chemiflry, by having 

 thejj plates properly fhaded aud highly finiihed. It is enough 



of 



