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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.

A dairy barn.

Dairy Barn

A dairy barn.

Milk bottles.

Milk Bottles

Milk bottles.

A bucket being used to weigh the milk production of a cow.

Weighing bucket

A bucket being used to weigh the milk production of a cow.

A dairy cow, suitable for the production of milk.

Dairy Cow

A dairy cow, suitable for the production of milk.

A typical dual-purpose Shorthorn cow.

Dual-purpose Cow

A typical dual-purpose Shorthorn cow.

A breed of cattle that is commonly known as the world's highest production dairy animal.

Holstein Cow

A breed of cattle that is commonly known as the world's highest production dairy animal.

A Jersey cow, valued for the richness of their milk.

Jersey Cow

A Jersey cow, valued for the richness of their milk.

A small breed of dairy cattle.

Jersey Cow

A small breed of dairy cattle.

Specialized cows devoted specifically for milk production.

Dairy Cows

Specialized cows devoted specifically for milk production.

An illustration of a drop of milk showing fatglobules, highly magnified.

Drop of Milk Showing Fatglobules

An illustration of a drop of milk showing fatglobules, highly magnified.

A woman mixing milk with acid to test it, using a rotary motion with the bottle not pointed towards her face.

Mixing Milk

A woman mixing milk with acid to test it, using a rotary motion with the bottle not pointed towards…

A woman whirling samples of milk in order to seperate the fat so it can be measured.

Whirling Milk

A woman whirling samples of milk in order to seperate the fat so it can be measured.

A small-top milk pail, with no hood.

Unhooded milking pail

A small-top milk pail, with no hood.

"Denmark is one of the best dairy countries of the world, and I doubt whether there is any other land which produces so much butter in proportion to its size." —Carpenter, 1902

Danish Milkman

"Denmark is one of the best dairy countries of the world, and I doubt whether there is any other land…

A pail.

Pail

A pail.

A scale used for weighing milk.

Milk Scale

A scale used for weighing milk.