166 Aiia/j/sis of Scientific Books. 



with flanges for bolting them together, with packing of lead, 

 as in water pipes, it will be most economically and conveniently 

 made in the quadrangular form. Across the bottom of one 

 end, an iron pipe, having a number of small holes, or thin slits, 

 might be laid, from the middle part of which a similar pipe 

 would rise to the top. This might be the receptacle of the lime, 

 reduced to pieces about the size of a plum. A valve at top, 

 opening freely inwards, would admit the external air, when the 

 equilibrium required it. At the other end of the clianiber, bu 

 near to the middle height, might be placed another horizontal 

 iron pipe, also perforated with little holes, from the middle of 

 which would ascend a vertical tube, considerably above the top 

 of the magazine. Here would be fitted a valve, opening out- 

 wards. If the grain had been stored in a somewhat damp 

 state, then a current of desiccated air could be easily deter- 

 mined through it, so as to render it speedily dry, by establish- 

 ing a small fire in the eduction pipe above the top of the 

 chamber. Thus a constant current of air would pass down 

 through the lime, and, in its hygrometrically dry state would 

 sweep through the body of grain, necessarily robbing it of its 

 pernicious moisture. We need not enter into further parti- 

 culars concerning the number and forms of these pipes, &c., 

 which will suggest themselves to every man of sound scientific 

 principles. In such a magazine, we believe that well-cured 

 grain, might be preserved for any length of time without dete- 

 rioration ; and at no further expense than the interest of money 

 on the first cost of the building. A pent-house roof should be 

 stretched over the chamber, to screen the workmen from rain 

 when they are introducing or discharging grain, inspecting its 

 condition, or changing the lime, which may be easily done by 

 having a false bottom to its cylinder, capable of being drawn 

 up by an iron rod fixed in its centre. The openings in the top 

 should be shut, after Glauber's plan, with grease-lute. 



Art. XVI. ANALYSIS OF SCIENTIFIC BOOKS. 



i. Voyacie en Ecosse, et mix Isles Hebrides, par L. A. Necker de 

 Hav^sv R^,Pr of esseur Honoraire de Mincralogie et de Gtologie 

 a I'Acadcrnie de Geneve, Membre de la Societc de Physique et 

 d'Histoire Naturelle de Ghitve, Membre Honoraire de la So- 

 cicte Geologique de Londres, et de la Socitte Wernerienne 

 d'Edinburg, ^c. 3 tomes, Sfo. pp. 1549. Geneve et Paris. 



This is a very pleasing work ; the production of an amiable 

 and accomplished mind. The author's principal object is 

 geology ; a subject which his studies in the great school of 



