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"a, larva within acron; b, acorn infested with the larva; c, head and thoracic segments of larva; d, one of the abdomincal segments of view; f, moth; g, basal joint antenna in the male moth."-Whitney, 1902

Acorn-moth

"a, larva within acron; b, acorn infested with the larva; c, head and thoracic segments of larva; d,…

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 illustration shows two glue cakes after the glue manufacturing process. The top image is a french cake, 7.5x7.5 inches square. The bottom image is an ordinary cake, a rectangle, 9 in by 5.5 in.

Glue Cake (Manufacturing)

This illustration shows two glue cakes after the glue manufacturing process. The top image is a french…

"Development of notochord : msl, mesoblastic skeletogenous layer ; pdc, paired dorsal cartilage; pvc, paired ventral cartilage; ns, neautral spine; na, neutral arch; tp, transverse process; articular process; c, centrum."—Finley, 1917

Development of the notochord

"Development of notochord : msl, mesoblastic skeletogenous layer ; pdc, paired dorsal cartilage; pvc,…

The articulation between the odontoid process and the atlas.

Odontoid Process

The articulation between the odontoid process and the atlas.

Diagrammatic representation of the sulphuric acid contact process. "Sulphur, or ores containing sulphur, are burned in air. The sulphur dioxide and the other gaseous products of the combustion are cooled, freed from dust, arsenic, and most of the moisture, then mixedwith air and passed through a tube containing a catalytic agent, usually finely divided platinum. The oxygen of the air cmbines with the sulphur dioxide and forms the trioxide, which is then combined with water to form sulphuric acid." -Brownlee 1907

Sulphuric Acid Contract Process

Diagrammatic representation of the sulphuric acid contact process. "Sulphur, or ores containing sulphur,…