Al0 Correspondence of J. Nickles. 
of Sciences by a commission consisting of MM. Cauchy, Piobert 
i imi nferred upon the author 
mes the ability to realize his conceptions, was of a different opinion, 
so have been the many scientific and practical men who have 
highly eich al a Sy rAL FS of this kind. The arithmometer of M. 
Thomas will b e World’s Exhibition of 1855 at Paris. The ap- 
saat is two “ hg and is honairanted for 30 numbers: it gives 
the products of 15 numbers by 15 e 
999, 999, 999; 999, 999, oe, "999, 999, 999, 999, 
It can nso me md xpress an amount exceeding the number of grains 
of wheat i 2 whole world, aoe there is written on the squares 
the large nuraber . 
8 999, 999, 999, 
and upon the first slide iy gtd ‘ ‘unit is written, by a single turn of 
the crank, there appears in an insta 
1,000, 000, a. oe 000 
-a result of a series of simultaneous ¢hanges, whieh are reittotiited as 
by enchantment. 
A description of this beautiful piece of sparen’ may be found in 
all its details in the Comptes Rendus for Dec. 11, 1854; it is by the 
Commission, by whom the arithmometer was examined and used for 
eee months to their entire satisfaction. 
the arms used in war in the 15th century. It isa French translation 
of a celebrated work written in 1473 and entitled ** Gouvernement des 
Rois, par Gilles Colonna, Aigidius Rome, fundatissimus Doctor,” to 
whom Philip ** Lé Hardi” King of France entrusted the education of 
his son Philip “* Le Bel.” - It contained originally 10 designs which are 
attributed to Jean de Bruges, “ Grand d-maitre” of the artillery of the 
Duke of Bourgogne Philip ‘* Le Bon.” ‘These designs are now but 
seven in number; but they are sted to prove that cannon, howit- 
zers, hollow projectiles, bombs, were not a Flemish invention, and that 
they were not first perl in the battle of Crécy ; that these agents of de- 
struction were perfectly well known at the end of the 14th century and 
the commencement of the 15th. Even ol hairs guns were not 
a recent invention, though reintroduced in es. 
Gilles Colonna taught his young atdeur’ to nest a breach into the 
most formidable ramparts in 14 to 20 days. 
Zoological Society for Acclimation ‘and Domestication—A yea 
has hardly Ai gras and this Society* has already extended itself enor- 
mously and engaged the attention of all men of science e and of almost 
* See this Journal, May, 1844, 
