VOL. I.j PHILOSOPHICAL TRANSACTIONS. 6 



1 1. Experiments touching the expansive force of freezing water. 



12. Experiments touching a new way of estimating the expansive force of 

 congelation, and of highly compressing air without engines. 



13. Experiments and observations touching the sphere of activity of cold. 



14. Experiments touching differing mediums through which cold may be 

 diffused. 



15. Experiments and observations touching ice. 



16. Experiments and observations touching the duration of ice and snow, and 

 the destroying of them by air, and several liquors. " 



17. Considerations and experiments touching the primum frigidum. 



18. Experiments and observations touching the coldness and temperature of 

 the air. 



19. Of the strange effects of cold. 



20. Experiments touching the weight of bodies frozen and unfrozen. 



21. Promiscuous experiments and observations concerning cold. 



A7i Account of a monstrous Calf. By the Hon. Robert Boyle. 

 N"' 1 and 2, pp. 10 and 20. 



This monstrous production was found in the uterus of a cow, killed by a 

 butcher at Limington, in Hampshire. Its hinder legs had no joints: its feet 

 were parted, so as to resemble the claws of a dog, [No. 2, p. 20] : and 

 its tongue was triple, one to each side of the mouth, and one in the middle. 

 Between the fore legs and hind legs was a great stone,* on which the calf rode, 

 weighing 20 lbs. The outside of the stone was of a greenish colour, but, some 

 small parts being broken off, it appeared a perfect free-stone. 



In the further account, inserted in the second number, it is added, that the 

 surface of the stone was full of little cavities, and that when broken, it exhi- 

 bited a great number of small pebble stones of an oval figure. Its colour (in- 

 ternally) was grayish, like free-stone, but intermixed with veins of yellow and 

 black. 



* As this remarkable concretion was not subjected to chemical analysis, its real nature must remain 

 unknown. It might be a deposition of osseous matter, (phosphate of lime) ; but it is more probable 

 that it was similar in its composition to the urinary calculi of herbivorous quadrupeds, and that it was 

 formed either from the water of tlie allantois or of the amnios. 



