244 M E M O I R S of the 
order to wafh away the drivel that comes from the moutTi 
ofthe mad dog; and the patient may take it in warm milk, 
beer, ale, broth, 6^6. for two or three feveral mornings; this 
remedy, when given in time, prevents all figns of madnefs, and 
IS a noble and infallible medicine. 
y>bi? true Origin of Caterpillars; by Dr. Geo. Garden. 
Phii. Trani: N° 257. p. 54. 
TH E bearers of fruit-trees are full of afperitics, and not 
fo fmooth in their bark, as the other parts of the tree 
are; if after harveft, and anytime in winter, you view thefe 
bearers thro' an ordinary microfcope, you will find the cavities 
full ot eggs, of an oblong figure, and citron colour; efpecially 
in fuch years and trees, wherein the caterpillars have been nu- 
merous; cut of thefc they are hatched in the fpring : The 
feafons which ufually deftroy them, are fuch as come in with 
early heats, fufficicnt to hatch them, before the coming out of 
the buds and bloffoms, and on which a nipping frofty air 
cnfucs, which foon kills them. 
The difcovery of this manner of their propagation feems to 
give light to the following conjectures, i. That we ought not 
to conclude, that any inle6ts are bred of corruption, and not ev: 
ovo, becaufe we cannot difcern the particular manner of their 
propagation. 1. That the female infefts of all kinds of flies 
and butterflies do probably lodge their fpawn near thofe places, 
where the Eruca\^ which are hatched of them, are to have 
their food. 5. They feem to be fixed to the cavities of the 
bearers by a glue, fo that rains cannot wafli them off. 4. The 
greateft frofls, it feems, do no hurt to the linall eggs of infefls^ 
for Dr. Garden obferved caterpillars to hatch, after very cold 
and frofty winters, of fuch eggs as were on the bearers all the 
winter round. 
The Divifion of the Monochord ; by Tir, Wallis. Phil. Tranf. 
N°258. p. 81. 
ANY ftring or chord of a mufical inftrumcut open, or at its 
full length, will found, what we call, an o6tave, or Dia- 
pafon, to that of the fame firing flopped in the middle, or at 
half Its length ; hence it is, that we commonly aflign to an 
oclavc, the duple ratio, or that of 2 to i, becaufe fuch is the 
proportion of lengths, taken in the fame ftring, which gives 
thole founds ; and upon a like account, we aflign to a fifth, or 
UJiafcnte, the fefqui-altcr ratio, or that of 3 'to z 3 and to a 
fourth, 
