There is no such thing as 'Sulphate of Bilgerius,' or 'Silica Bilgica,' or anything like them", and then the old fellow chuckled to himself over my supposed ignorance.

The tannin is shown by its striking a black colour with sulphate of iron, and is the cause of the dark stain which is always formed when tea is spilt upon buff-coloured cottons dyed with iron.

Certain articles of food also contain small amounts of sulphur and phosphorus, which undergo oxidation into sulphates and phosphates.

Our own water-lily is rather more powerful in its uses; the root contains tannin and gallic acid, and a decoction of it "gives a black precipitate, with sulphate of iron."

" The minerals referred to consisted of choice and large specimens of the colored and crystaline fluates of lime from Illinois, and the attractive species and varieties of sulphates of barytes, sulphurets of lead, radiated quartz, &c. &c., from Missouri, which I had revisited in 1821.

In the first place, certain chemicals will successfully remove the scale formed by water charged with bicarbonate of lime, and have no effect on water charged with sulphate of lime.

Alkalies of any kind, such as soda, will be found good in water containing sulphate of lime, by converting it into a carbonate and thereby forming a soft scale, which is easily washed out; but these have their objections, for, when used to excess, they cause foaming.

Petroleum is not a bad thing in water where sulphate of lime prevails; but you should use only the refined, as crude oil sometimes helps to form a very injurious scale.

In addition, the whole foot may then be immersed for some hours daily in a cold bath, which bath should be strongly impregnated with one or other of the following salts: Iron Sulphate, Zinc Sulphate, Copper Sulphate, Aluminium Sulphate, Lead Acetate, or Sodium Chloridebetter still, a mixture of the various sulphates here mentioned.

A great favourite of mine consists of equal parts of sulphates of copper, iron, and zinc, mixed with strong carbolic acid, a very little vaseline being added to give the mass cohesion.

Solutions of carbolic acid, of perchloride of mercury, of zinc chloride, or of moderately strong solutions of copper sulphate, are all of them useful (see also treatment of coronitis on p. 236).

The composition of natural sea-water is, in a thousand parts, approximately, as follows: Water, 964 parts; Common Salt, 27; Chloride of Magnesium, 3.6; Chloride of Potassium, 0.7; Sulphate of Magnesia, (Epsom Salts,) 2; Sulphate of Lime, 1.4; Bromide of Magnesium, Carbonate of Lime, etc., .02 to .03 parts.

The composition of natural sea-water is, in a thousand parts, approximately, as follows: Water, 964 parts; Common Salt, 27; Chloride of Magnesium, 3.6; Chloride of Potassium, 0.7; Sulphate of Magnesia, (Epsom Salts,) 2; Sulphate of Lime, 1.4; Bromide of Magnesium, Carbonate of Lime, etc., .02 to .03 parts.

Now the Bromide of Magnesium, and Sulphate and Carbonate of Lime, occur in such small quantities, that they can be safely omitted in making artificial seawater; and besides, river and spring water always contain a considerable proportion of lime.

The ash weighed 52 per cent., the soluble part of which, 18.5, was mostly potassium carbonate, with some chlorides and sulphates; the insoluble, mostly chalk with iron and alumina.

We have frequently remarked small radiant and arborescent crystallizations on dirty windows in London, and have found them to consist of sulphate of ammonia.

This salt, or at least, sulphite of ammonia (which becomes sulphate by exposure to air), is an abundant product of the combustion of coal.

The speaker had, finally, demonstrated the synthesis of hippuric acid and sulphate of phenol in the excided kidney as a function of its cells, by adding to the blood pouring through the kidney, in the first place, benzoic acid and glycol; in the second place, phenol and sulphate of soda.

The speaker had, finally, demonstrated the synthesis of hippuric acid and sulphate of phenol in the excided kidney as a function of its cells, by adding to the blood pouring through the kidney, in the first place, benzoic acid and glycol; in the second place, phenol and sulphate of soda.

The compound used principally for the electro-deposition of nickel is a double sulphate of nickel and ammonia.

About eight ounces of the double sulphate to each gallon of distilled or rain water is a good proportion to use when making up a bath.

In preparing the double sulphate, English grain nickel is decidedly the best form of metal to use.

When sufficient metal has been dissolved, and the unused nitric acid expelled, the salt may be precipitated by a strong solution sulphate of ammonia, or, if much free acid is present, carbonate of ammonia is better to use.

On a future occasion I hope to supplement this paper with the analysis of the double sulphates used, and an account of the behavior of electrolytically prepared crucibles and dishes as compared with those now in the market.

HALE, FRANK E. The use of copper sulphate in control of microscopic organisms.