\ 
416 Correspondence of T. S. Hunt. — 
named, pisciculture. He died as he lived, poor and modest, having 
cad i had opportunity to enjoy the pension allotted to him by govern- 
ent. He expired at 51 years of age in his native village /a Bresse 
‘icinantingh of Vosges). We have, during his life time, given a short 
account of his career, which may be found in the volumes of this Jour- 
nal of the two years past. He left a wife and six children, the oldest 
of si a young man of 30, shows talents similar to his father’s, if 
we may judge from his fulfillment of the charge committed to him by 
the minister of Agriculture for Ag the Loir 
Monument to Arago.—The rie for the erection of a monu- 
ent to = have amounted to a sum sufficient to prado out the 
patra a ae cntie te eoaltoeed.y 
Extract from a letter Ba ‘T. 8. Hunt to J. D. Dana, dated reid 
a, March 12, 1855. 
On the Equivalent v some species.—The crystals of the. compound 
of grape-sugar and common salt, which you have found to be rhombo- 
hedral, closely ie i a to ~2R of page gave me by ee 
being 1 000), and gives for the ge formula with an equivalent 
toe of 436-5, a volume of 279-25, which doubled is 558:5. 1 bad 
PESWORNT as you know, fixed the volume of calcite and the species ho- 
omorphous with it, at between 555-0 and 564-0, and the present de- 
Seecees seems to confirm the correctness of my view. . It is wor orth 
while to compare the volume of this compound with those of milk-su- 
gar and cane-sugar, both prismatic species, whose volumes, co 
ing like the above to Cas, etc., are respectively 464 and. 430, accord 
ing to the determinations of Playfair and Joule. Correct obser 
upon the crystallization and density of grape-sugar are still mo 
The crystals of codeine which you find to approach brookite in form, 
and which may likewise be compared with Barytest, gave me in three 
*. The erystale-are Little shovter tha ‘broad: wsdd prevent the faces of am acute 
the thombohedron, ox over a lateral edge is 101° 40’, giving for the angle over the ter- 
edge 78° 20’. The angle of -22 in calcite ie78 
‘The angles obtained by the writer for codeine using reflect refected Tight, with the te 
flecting goniometer are I: [= 99° 48’, 5:43 =134° 20/, 11: 1%==98° 20’. Miller ob- 
tained for the corresponding les 100° 46’, 184° 60" and 92° 20°; and Kopp four’ 
101° 30’ aud 92° 20’." If Miller's 134° 50" is right, then his 
