On tlu Hydrometer, 32^ 



backwards, but mud have been as reprefented in the figure, 

 the points thrown out by the fpiral twift on each fide: — hi 

 this poiition they might have anfwered in ftrikingdown fmall 

 animals, or in detaching thell-fifli from the bottoms of rivers, 

 or even in afccnding the b;inks. 



In tlie elephant the orbit of the eye is fituatcd at C, 

 whereas in the correfponding part at C in the mammoth is 

 a large mafs of bone, fo that the eye mull have been elfe- 

 where : to afcertain wliere, we mud wait until we receive the 

 cranium lately difcovercd on the Ohio. The cheek of the 

 elephant is formed of two bones; but in the mammoth, befidcs 

 other variations, there is but one bone. The whole figure 

 of the under-jaw differs moft remarkably ; firft in the length 

 of the condyles or arms from E to B : in tlie mammoth it is 

 fhort and angular ; but in ihe elephant D K B forms a femi- 

 circular line, and at D it is long and pointed. 



This {hort reference is fuflJicicnt to dircA the attention of 

 thofe who wiOi to examine them more critically ; when they 

 may remark feveral other charadters futbciently interefling. 



XXXV. On fhc llydrojjietcr. iJy Willi AM Spekr, E/^'. 

 Supervlfor and '^JJi-iyer of Spirits in the Fort of Dull in. 



[Cor.cludtd from p. i6i.] 



I 



SHALL now proceed to explain Mr. Gilpin's tables, 

 in order to demonflrate their ufe^ and the ufe of my addi- 

 tional columns. The firft I cannot do belter than in the 

 words of Sir Charles Blagden himfelf: 



" Tables for reducing the quantities by weight, in any 

 mixture of pure f|)irit and waler^ to thofe by meafure; and 

 for determining the proportion, by meafiu'c, of each of the 

 two fubftances in fueh mixtures, by Mr. George Gilpin, 

 clerk to the Uoyal Society, communicated by Sir Charles 

 Blagden : 



" Thcfe tables are founded on the experiments, of which 

 the refults were given in the Report and Supplementarv Re- 

 port on the heft Method of projiortioning the Excife on Spi- 

 rituous Liquors. They are eom|)uted for every degree of heat, 

 from 30'' to 80", and for the addition or fubi raft ion of every 

 one pari in a hundred of water or fpirit; but as the ex|)eri- 

 inenis iheinfelvcs were made only to every fifih degree of 

 licat, and every five in the hundred of water or fpint, the 

 intermediate places arc filled up by interpolation in tire ufual 

 nianner, with allowance for li-eond dilleieuees, 



1' 3 « Every 



