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"Different Kinds of Milk Bacteria. It is not uncommon for a large number of person to be poisoned from eating ice cream at some public gathering. This is caused by a change in the milk brought about by the presence of bacteria. The poisonous product of their action called "tyrotoxicon", may also be found in other foods which have milk as their basis, such as cheese, custard, and so on. There are vomiting and purging within a few hours after eating the food, succeeded by a great nervous prostration, from which recovery follows slowly." — Blaisedell, 1904

Milk bacteria

"Different Kinds of Milk Bacteria. It is not uncommon for a large number of person to be poisoned from…

A clean dairy barn, with cows feeding.

Dairy barn

A clean dairy barn, with cows feeding.

The butter churn is a device used to convert cream into butter. This is done through a mechanical process, frequently via a pole inserted through the lid of the churn, or via a crank used to turn a rotating device inside the churn. The agitation of the cream, caused by the mechanical motion of the device, disrupts the milk fat.

Butter Churn

The butter churn is a device used to convert cream into butter. This is done through a mechanical process,…

This churn is a device used to convert creams into butters.

Cream Separator and Churn

This churn is a device used to convert creams into butters.

"The cream separator is a machine for separating the cream from the milk. It does the work much better and much more quickly than it can be done by allowing the cream to rise in pans or in cans." — Goff, 1904

Cream Separator

"The cream separator is a machine for separating the cream from the milk. It does the work much better…