458 PHILOSOPHICAL TRANSACTIONS. [ANNOI699. 



will obtain, as the animadvertor acknowledges, if the aforesaid weight (as in the 

 ■ common mechanics) incumbing upon the plane mp, is drawn by help of a pulley, 

 at M, by another weight incumbing upon md ; then this will be to that, as 

 nS to d(?. 



Other things remaining as before, if the manner of application of these powers 

 ' be changed, so that to the middle point m of the flexible line do, whose 

 extremity d is fixed, a weight be applied exerting its force according to mf ; (for 

 in descending it would describe an arch with centre d and radius diw) the force 

 of this weight to bend the flexible right line at m, would be infinite in respect 

 of the force of its absolute gravity. And the force drawing according to md, 

 which is required in order to prevent the aforesaid bending, would also be in- 

 finite in respect of that which was before required, to support the weight m in 

 the plane mp. So that the powers which in the former manner of application 

 were expounded by dJ and ^d, must now be expounded by infinitely greater 

 lines, which are still proportional to the former. For as before, the weight m 

 draws according to the direction mf, and the power sustaining it according to 

 MD ; and that these two are in equilibrio appears from the parts of the chain be- 

 ing at rest. Therefore the ratio of these remains the same as before. But the 

 cause which extends into a right line, the flexible line dD (whose extremity d is 

 immoveable, and to whose middle point m a weight is applied, which is indeed 

 infinitely little, but whose force by this manner of application is made infinitely 

 greater, and therefore in the language of the animadvertor becomes assignable) 

 is the weight of the chain da, fig. 6, pi. 4, which is proportional to its length. 

 This therefore is to the constant and assignable quantity «. (proportional to the 

 constant but not assignable quantity dS) as Di^ to Sd. And thus I hope it will 

 appear to the animadvertor, that I have proved the conclusion to be true, with- 

 out making any erroneous positions. 



Of two Monstrous Pigs, and a Monstrous Double Turkey. By Sir John Floyer.* 

 Communicaled by Dr. Edward Tyson, F. R. S. N° 259, P- 429. 



By the description of the following monsters I design to prove, that the 

 distortion of the parts of a foetus may occasion it to represent the figure of 



* This physician was author of several ingenious worlds, such as Pharmacobasanos, or the 

 Touchstone of Medicines (16"87) ; in which he attempted to account for the virtues of medicines by 

 their taste and smell ; both of them fallacious tests, since some of the most sapid substances possess 

 but little medicinal action ; while others, which make but a slight impression on the tongue and 

 olfactory nerves, in many instances produce the most powerful and salutary efferts ; not to mention 

 (as a celebrated pliysician has remarked) that it is impossible to define all the different degrees of 

 taste andsmell. Psychrolusia, or a Treatise on Cold Bathing 1702 j the Physician's Pulse Watch ; a 



