Description of a Dynartomefcr. 399 



When the mixture has boiled half an hour, pour it into a 

 flat veffel, in order that the charcoal may fubfide to the 

 bottom ; then pour off the liquid, and place it over the fire 

 once more, that the fuperfluous water may evaporate, and 

 to give to the molaffes their former confiftence. Twenty- 

 four pounds of molaffes will produce twenty-four pounds of 

 fyrup. 



This method has been employed on a large fcale with the 

 happieft effects ; the molaffes become fenfibly 'milder, and 

 can be employed in many articles of food ; though in diflies 

 where milk is ufed, or for cordials mixed with fpices, fngar 

 is to be preferred. 



XI. Dtjcriptjon and Ufe of the Dynanometer, or Injlrnment 

 for ascertaining the relative Strength of Men and Animals. 

 Invented by Cit. Regnier. From Journal de 1'Ecolc 

 Polytechnique, Vol. II. 6th Year. 



w. 



HEN Sanclorius invented his balance, he taught 

 ns what we lofe by infenfible perfpiiation ; and no one, 

 without this difcoyery, would perhaps ever have imagined 

 that the matter thrown out from the bodv is more than half 

 what we receive as nouriilnnent. Knowledge no lefs im- 

 portant might be acquired, had we the eafy means of afcer- 

 taining, in a comparative manner, our relative ftrengths at 

 the different periods of life, and in different iiates of health. 

 Buffon and Gueneau, who had fome excellent ideas on this 

 fubject, rcquefted me to endeavour to invent a portable raa- 

 ohine, which, by an eafy and fimple mcchanifm, might 

 conduct to a folution of this queftion, on which they were 

 then engaged. Thefe philofophers were acquainted with that 

 invented by Graham, and improved by Dr. Dcfaguliers, at 

 London ; but this machine, conftru£ted of wooden-work, 

 was too bulky and heavy to be portable ; and, befides, to 

 make experiments en the different, parts of the body, feveral 



machines 



