Micrographia: or some physiological descriptions of minute bodies made by magnifying glasses. With observations and inquiries thereupon / By R. Hooke.

Robert Hooke

Date:: 1665

Credit: Micrographia: or some physiological descriptions of minute bodies made by magnifying glasses. With observations and inquiries thereupon / By R. Hooke. Source: Wellcome Collection.

277/384 page 215

$were divided into fevera'l fmaller and greater bldek teeth, was -nothing bat one fmall bended hard bone,which was plac'd in the upper jaWofthe mouth ofa Houfe-Snail, with which I obferv’d this Very Snail-to feed oh the leaves of a Role-tree, and to bite out pretty -large and half nound bits, not unlike the Figure of a (C) nor very much differing from it in bignefs, the upper part A B C D of this bone, I found tobemudi wHitdr, and to grow out of the upper chap of rite Snail.G G G,and not to be any¬ thing neer fo much creas’d as the lower and blacker part of it H11H fe K'H which was exactly fhap'd like teeth, the bone growing thinner, or taper¬ ing to an edge towards K K K. It feetn’d to have nine teeth. Or prominent parts I K, IK, IF, &v. which were join’d together by the thinner inters pos’d parts of the bone. The Animal to Which thefe teeth belong, is & very anomalous creature, and feems ofa kind quire diftind from any other terreftrial Animal or Infecl, the Anatomy Whereof exceedingly di*F fering from what has been hitherto gi von of it I fhould have iUferted,but that it will be more proper in another place. I have never met with any kind of Animal whofe teeth are all join’d in one, lave onely that [lately obferv’d, that all the teeth ofa Rhinocerot, which grow oh either fide ofits mouth, are join’d into one large bone, the Weight of one df Which I found to be neer eleven pound Hatrercfopvis. SO that it feeilis one of the biggeft fort of terreftrial Animals, as well as one of the fmafleft, has his teeth thus lhap’d. .; j . 1} ! ]. —----—M-*—./.j ,, .■■■« ■■ -•— .■ i~-> »«««■« abirj forli . ■, j-fi i\nl ■ Obferv. X LI. Of the Eggs o/Silk-worms^^ other kfefis* ■ ■ I in m;l d'J 1 noni om mri of'^boipnwd rH THe Eggs of SiIk-worms(one of which I have deferib d intfie fecond Figure of 25. Scheme} afford a pretty ObjefHor a Mitvofiope that magnifies very much, efpecially if it be bright weather, and the light of a window be caft or colle&ed on it by a deep Convex-glajf, or Water-balk For then the whole furface of the Shell may be perceiv’d all cover’d over with exceeding fmall pits or cavities with interpofed edges, almoft in the manner of the mrface of a Poppy-feed,but that thefe holes are not an hun¬ dredth part fcarce of their bigneff* the Shtlljwhen pile young ones were hatch’d (which I found an eafie thing to do, if the Eggs were kept in a warm place) appear’d no thicker in proportion to its bulk,then that of an Hen’s or Goos’s Egg is to its bulk,and all the Shell appear'd Very white (which feem’d to proceed from its tranfpafency) wnenee all thofe pit- tings did almoft vanifb, fo that they could not, Without much difficulty, be difeern’d, the infide of the Shell feem’d to be lin'd alfo With a kirid of thin film,not unlike (keeping the proportion to its Shell)that with Which the fhell of an Hen-egg is lin’d ; and the ftiell it felf feenfd like Common Egg’fhells, very brittle, and Brack’d. In divert other of thefe Eggs I could plainly enough, through the fhell, perceive the frUall Infdft lid coyled round-the edges of the fhell. The fbape of the Egg^felf, the Figure pretty well reprefentsf though by deftuR Of the bnA not$