1835.] 



Scientific Intelligence, 



393 



gallons at 62^. In this table, a spirit which had diminished in 

 volume at any given temperature, 0*7 per cent, for example, would 

 be expressed by 1)9*3. These two tables, therefore, will give first the 

 proportion of standard spirit at the observed temperature, and next 

 the change of bulk of such spirit, from what it would be at the 

 standard temperature. Thus, at 51'', with 8240 indication, 100 

 gallons of spirit under examination, would be equal by the first table 

 to 164-8 gallons of standard spirit at that temperature 3 and by the 

 second table, 99*3 gallons of the same spirit would become 100 at 62", 

 or in reality, contain the 164*8 gallons of spirit in that state in which 

 only it is to be taxed. But as neither of these tables can alone be 

 used for charging the duty, for neither can express the actual quan- 

 tity of spirit of a specific gravity of 0*92 at 62^ in 100 gallons of 

 stronger or weaker spirit, at temperatures above or below 62°, a third 

 table is essential, combining the two former, where the quantities 

 should be set down in the actual number of gallons of standard spirit, 

 at 62^ = 100 of the spirit under examination, and the column of 

 quantities may be expressed by the term value. Thus, 



Temijeratare 45°. 



INDICATION. STRENGTH. VALUE. 



9074 



7 

 9 



81 

 3 

 5 

 6 

 9 



90 

 3 



114.5 

 114 3 

 114*2 

 114*0 

 113-9 

 113*7 

 113-6 

 113*4 

 113-3 

 1131 



Temperature 75°. 



INDICATION. STRENGTH. VALUE. 



8941 

 4 

 5 

 8 

 9 

 52 

 3 

 6 

 7 

 9 



114-5 

 114*3 

 114-2 

 114*0 

 113 9 

 113*7 

 113*6 

 113*4 

 113 3 

 113*1 



Although this is the only table necessary to be used by the Excise, 

 the committee recommended printing the other two, because they 

 must be constructed, and it would be matter of regret, that they 

 should not be rendered permanent. 



II. — Passage of Electricity through Liquids,^ 



The apparatus employed by Sr. Matteucci in determining the con- 

 ductibility of electricity through liquids, consisted of a small table 

 with four legs, pierced with three circular holes, of which two are 

 destined to hold small glass vessels, and the third, situated between 

 the others, contains a porcelain vessel pierced in the centre. The 

 two extreme vessels contain a layer of mercury ; in the middle one is 

 placed the liquid to be examined. A communication is established 

 between the three vessels by means of two platinum wires, in the 

 form of a horse shoe, and retained by a bit of gum lac in the proper 



* Bibliotheque Universelle, February, 1835. 



