: Scientific American Supplement No. 841 February 13 1892 by Various - Science Periodicals Scientific American

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Electricity in Horticulture.--The effect of the electric light on vegetation, availability it may possess for the gardener

Boron Salts.--Boron sulphides and selenides and silicon selenide

Detection of Peanut Oil in Olive Oil.--A practical laboratory test for the above adulteration

Hydroxylamine.--Recent preparation of this compound and its properties

New Boron Compounds.--Compounds of boron, phosphorus, and iodine recently prepared by M. MOISSAN

The Eruption of Krakatoa.--A graphic description of this catastrophe, involving the lives of 35,000 people

Burning Brick with Crude Oil Fuel.--The use of petroleum in brick kilns.--Its advantages, cleanliness, and cheapness.

Chlorine Gas and Soda by the Electrolytic Process.--The decomposition of common salt solution into chlorine and caustic soda on the commercial scale

How Mechanical Rubber Goods are Made.--Hose, corrugated matting, packing, and jar rings.--Processes of their production

THE LIVING JERBOA IN THE ZOOLOGICAL GARDEN OF BERLIN.

Like other strangely formed quadrupeds, the jerboas are counted among the curiosities of the animal kingdom, and as such are described in natural history; but, nevertheless, there has never been a good exhibition of them, for the simple reason that live jerboas are seldom seen in Europe, as they usually die during the journey hither or soon after their arrival. After some hesitation I decided to purchase a pair that I happened to find mentioned in the price list of Mr. C. Reiche, of Alfeld, as one of the most interesting specimens obtained during his expedition to South Africa the year before; but I, also, found the sensitiveness and delicacy of the jerboa very trying, for the short journey from Alfeld to this city caused the death of the female and reduced her mate to such a condition that when it arrived there seemed little hope that it could ever be utilized for scientific research or artistic life studies.

My anticipation and pleasure were changed to vexation and grief. The most careful nursing--the stiff, weak little legs were dipped into and rubbed with French brandy--and a warm pen with a dry sanded floor directly over a heater, did their work. As the new-comer got on his feet again my hope gained new life, and now our jerboa is my delight. It is, indeed, a curious animal. One who saw it only in the day time asleep would scarcely know what he had before him, for he would see little more than a mass of soft, bright sandy hair. The coming of the keeper with the dish of food and the unfastening of the door of the cage bring life to the ball of hair in the corner; a part of it is unrolled and the long, black-tipped tail with two lines of hair is laid out on the ground, and then on each side of it a leg is run out which is nearly as long as the tail and is provided with blunt, smooth, hoof-life nails; and, finally, the head and body are distinguishable and the animal stretches out comfortably on its back in the sand. The fine-skinned, hairless ears still hang limp, the eyes are half closed and the short fore legs are crossed under the chin.

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