ted observation, will in his opinion, be hereafter of little con- 
sequence, unless, by a chance on which it would be unsafe to 
rely, it should happen to be made at a point where the action 
of a would be a maximum or aminimum. In general 
ers should hereafter endeavor to repeat their Dbesrea: 
tions, ponte along the same parallels, or on the same merid- 
ian, inorder to ascertain the laws (if any such exist) which 
regulate the diversity _— can now no longer be contested. 
The author concludes his memoir in observing that the Eng- 
= Bane erred in taking the length of the m as the 
their metrical system, as this Jengt may vary from 
eo na sis are quite independent of mere topographical 
position, and which may not remain constant at the same 
place during a course of ages. On this account, the basis of 
the French measure is not liable to the same inconvenience 
to the same extent.—Jdem. 
- 2000 ieotiow “si a cheap and eas a mode of preserving 
ice for domestic purposes. 
1500 francs for a Rasp, which will peace ts hundred 
Kilogretimes (one thousand six hundred pounds ur of 
beet roots to a pulp, with the force of four men. And 
2000 francs for the best press, which will extract seventy- 
_ to seventy-five per cent of juice from the pulp. 
000 francs for the perfection of the method of producing 
hye 
6000 francs for an economical process of making solid 
of ultramarine, equal to that which is obtained from 
fp Jazuli. 
5000 francs for a process for drying meat, which will se- 
cure it oe it rca putrefaction or taint in long southern voyages. 
A portion of meat has been exposed during ten years, in the 
mint at Paris, in a Leroy in which it is not prote tected 
either from dust or atmospheric changes, and-w after 
being washed and osékell is still savoury andgood. It was 
diate preserved bye M. Vilaris, an apothecary of perneanx, 
sais secret died wi th him.— Programmes des pris. &c. 
