( 3044 ) 
of Bodies, and iacreafed by the force of Northerly winds ; 
where he notes , that the Cold Air, by its parts, figurd for 
the purpofe, and penetrating fuch bodies as are dilpofed to 
glaeiationj divides the parts of the fame , and arrefts their 
motion. Here he endeavours to prove, that Frozen water 
is not properly coudenfed, though it be hardned and fixed; 
but that 'tis rather dilated by the idgrels of the Cold 
Air 3 whence he obferveth that Ice is really lighter than 
Water. 
Secondly, he difcourfeth oi Fire^ after he hath difcarded it 
from being one of the comrtion Four Elements , and dif- 
lodged it from its reputed place above the Air under the Con- 
caveof the Moon : And aifirmSj that 'tis the Heat of the 
SuDj which moves, quickens, and coagulates the three fas 
milies of Mixts , Animals , Vegetables and Minerals , yet 
withall taking ia a Subterraneous heat for the produftion of 
Minerals. 
In the I^^^<?r Trad: of this Book, the Author explains an 
Invention of his, oi Arithmetical Cylinder^ For^ finding 
that in the of the Noble Nepper^ the multitude and 
embarafment of thofe fticks^ filled with numbers on alllidesj 
proved longfom and tedious 3 and that thereupon the pradrife 
of the Invention had ceafed 5 he confider'd of a v^ay to 
render it more expeditand eafie^ and at length concluded, 
to take bands of pafl-board inftead of fticks j on which 
having written the felf fame Multiplej from i to 9, and made 
the fame diftribution of the numbers into little fquares, fe- 
parated by a diagonal, drawn from the left to the right hand 
upwards^ (as thofe Sticks are;) he added thereto a file oi 
Roman Numbers ^ II, III, IV, V, VI, VII, VIII, IX, 
to be put on the fide, and over againft the Multiplying and 
Dividing Numbers 5 very ufeful as well for marking the be- 
ginning and end of the (aid numberSj to flop where *tis need- 
ful (all the bands not being ufed in all operations^^ as for 
marking the Mz^//^//??^, which you fiiall ufe in each number. 
AS5 (^.^.) to multiply 7 by 5 or by 9^ inftead of being at the 
trouble of counting the ranks of thefe Multipkj 5 and 9, they 
may 
