^"oirn^al,JlS;Tl«7a'] of MUTi uudev ceHain Conditions. 39 



liot weather. I hope to be able to resume the inquiry next summer 

 under different conditions, which have suggested themselves during 

 the examinations I have detailed. In any case M. V. Essling's 

 suggestion to bottle the milk is very good, and in my opinion 

 cream pans with covers would be a very great improvement on 

 the open ones as at present employed, at the same time having due 

 regard to the cleanliness of the apartment and vessels in which the 

 milk is kept. 



In a microscopical examination such as I have recorded it is 

 quite necessary to have pure materials. The milk as supplied by 

 vendors we know to be very frequently adulterated, and the most 

 simple and easy method is by the addition of water. We know 

 also that in towns where the water has a high character for purity, 

 it sometimes happens in dry hot weather the reservoirs are charged 

 with vegetable and animal organisms. Milk may not always have 

 town's water added to it; in this case there may be an extra 

 quantity of vitalized matter introduced. What a surprising ac- 

 count a microscopist might furnish from the examinatien of milk 

 containing such an importation ! In the cold weather, such as we 

 have at present, animal organisms are not so abundant, and this 

 may account for their absence from a sample of milk obtained in 

 this town, in which I found algae, but not belonging to the pure 

 milk. One curious circumstance was noticed in this milk, no Mucor 

 Mucedo appeared in or on it, although exposed in the closet for 

 the same length of time as Mr. Kipping's milk, which showed signs 

 of this growth on the sixth day, and on the tweKth day the town 

 milk had none visible. I may mention that pure milk in a bottle 

 securely corked remained fresh twelve days ; possibly the low tem- 

 perature favoured its preservation. — A Paper read before the 

 Literary and Philosophical Society of Manchester, Nov. 30th. 



