1833.] Miscellaneous. 493 
The sale has not, we believe, been so rapid as might have been expected, amount- 
ing to no more than ten maunds per diem, although Mr. Rocers has fixed the price 
at the low rate of 4 annas per seer, one half the price estimated for the Hugli ice, 
which was still calculated to be somewhat cheaper in proportion than saltpetre. 
The public requires to be habituated to it, and to be satisfied of the economy of 
its substitution for the long established process of cooling. There may also be 
some doubts of the best mode of preserving so fleeting a commodity, but on this 
head we cannot butadvise an imitation of the methods pursued on a large scale on 
board of the Tuscany, For the application of the ice to the purposes of cooling 
ample directions have been given in the GLEANINGsS of ScreNcE, vol. iii. p.120. A 
box, or basket, or tin case, with several folds of blankets, or having a double case 
lined with paddy chaff or any non-conducting substance, will preserve the ice until 
wanted, and for cooling water or wine the most effectual method of all is to put a 
lump of the clear crystal into the liquid : the next best is to spread fragments upon 
the bottles laid horizontally, andleave them wrapped in flannel for a couple of hours. 
So effectual was the non-conducting power of the ice-house on board, that a 
thermometer placed on it did not differ perceptibly from one in the cabin. From the 
temperature of the water pumped out, and that of the air in the run of the vessel, 
Mr. DrxweE zt ascertained that the temperature of the hold was not sensibly affected 
by the ice. Upon leaving the tropic and running rapidly into the higher latitudes, 
it retained its heat for some time, but after being several weeks in high latitudes, 
and becoming cooled to the temperature of the external air and sea, it took more 
than ten days in the tropics before the hold was heated again to the tropical standard. 
Mr. DrxweE tt has favored us with a sight of the daily register kept by him- 
self on board, which we regret we have not space to insert at length :—The follow- 
ing extracts however will serve to impart some of the useful information gleaned 
in this first experimental passage from Boston : we sincerely hope and believe that 
it will afford ample encouragement for a repetition of the speculation, and eventu- 
ally for a regular annual consignment of this new staple produce of the northern 
continents ! a scheme is now in circulation for supplying ice all the year round at 
2 annas per seer. 
Extracts from the Log of the Ship Tuscany. 
oe eee eee 
Date. ) Latitude ;Longitude } Temp. of; Temp. of} Fall of | wing, 
1933. | atnoon. | atnoon. air. water. |Ice-guage. Remarks. 
es ey oi . inches. be 
May 13] 41 30 N| 66 44 W. 61 _ S. W. | moderate. 
16 | 39 26 54 51 64 70 N. W. fresh. 
20 | 34 24 43 00 70 68 W oe “ee 
ay. temp. in N. tem 
24) 27 48 | 33 44 71 73 N. E. nie sores ¥ 
28 | 20 48 | 30 29 78 76 E. | air 68.3—water 72.3. 
June 1); 13 05 25 33 80 79 4 N. E. light airs. ’ 
: 6) 7 2 19 51 86 85 N. E. ditto. « 
oO y > 
16 | 0 52 | 18 05 84 83 71 | SE. ‘eo oe 
19 4 04 S\ 92 Q1 82 80 S. E. W. 81°.5. 
[Having occasion to open the run scuttle, found the air pouring up fram the hold quite warm: a 
therm. which stood at 80° in the cabin, rose to 84° in the run. } 
30 | 23 29 | 28 29 | 76 | 73 | 92 | =. {*% temp, S. tropic. a. 
{July 2, bored with an auger into the ice house, under the main hatch, and came to ice at 10 inches 
from the top. Cargo as usual dry. } 
wy 4129 38 [ 19 3B°{ 7 [ 70 es iG | W. | fresh winds. 
