Lutes

See Cements,

Artificial Manures

These constitute a new and important branch of manufacture; but a few of the more simple and readily prepared kinds are all that can be noticed here.

Powder for Coating Seeds

Fine bone-dust 20 parts, gypsum 1 part. The seeds are steeped in water from the dunghill, then strewed over with the powder, so that each shall receive a layer of it. They are afterwards dried.

Sulphated Bones

See Bones, Sulphated. A usual proportion is 33 of sulphuric acid to 1 cwt. of bones.

Saline Mixture, as a top dressing for potatoes, etc. Equal weights of nitrate of soda and dry sulphate of soda, 1 1/2 cwt. to an acre.

Mr. Huxtable's Mixture. Bone dust 4 cwt., gypsum 4 cwt., salt 2 cwt., ashes 2 quarters, wood ashes 30 bushels.

Another Saline Mixture

Sulphate of ammonia 42 lbs., sulphate of lime 56 lbs., sulphate of potash 5G lbs., carbonate of magnesia 14 lbs., salt 56 lbs., to 1 acre.

Dr. Anderson's Manure for Clover Sulphate of ammonia 98 lbs., gypsum 172 lbs., sulphate of potash 174 lbs., sulphate of soda 333 lbs., sulphate of magnesia 246 lbs., sulphuric acid 98 lbs., salpetre 202 lbs., common salt 107 lbs., chloride of potassium 149 lbs.

Dr. Johnstone's Substitute for Guano. Bone-dust 7 bushels, sulphate of ammonia 100 lbs, wood ashes 20 lbs., salt 100 lbs., dry sulphate of soda 11 lbs.

How To Promote the Blowing af Flowers

See page 355.

How To Clean Marble

Mix soft soap, solution of potash, and slaked lime, to a paste; spread it over the marble, and leave it for a day or two. Then wash it off.

How To Stain Marble

Make the marble hot, and pour on it the coloured liquid, also make hot. The stains usually employed are archil, solution of indigo, solution of verdigris, decoction of Brazil wood, logwood, and sulphate of iron, tincture of dragons' blood, etc. But the most penetrating medium is wax, which may be coloured with alkanet, anotto, verdigris, etc.

Marine Glue

See Glue.

Marine Soap

See Soap, Marine, further on.

Promethean Matches

These consist of a composition similar to that of the chlorate of potash matches, inclosed at the end of a paper spill, with a minute glass bulb filled with oil of vitriol in the centre of the composition. When struck, the vessel of acid is broken, and kindles the match. Methylated Spirit. Spirit of wine mixed with 10 per cent. of rectified wood spirit is allowed to be sold under this name, free of the excise duty. It cannot be used for drinking purposes, or for the preparations of medicinal tinctures. It is extensively employed for burning in lamps, and for the preparation of polishes, varnishes, and lacquers. The law forbids methylated spirit, or any preparation containing it to be used internally.

Microscope, FormulAe for various substances required in the workking of.

Reagents

Dr. Beale's list.

1. Alcohol, of various strengths.

2. Ether, to dissolve oil-globules.

3. Nitric acid, 1 part of strong acid to 5 of water.

4. Sulphuric acid, 1 to 5.

5. Hydrochloric acid.

6. Acetic acid, glacial, and dilute (1 to 5).

7. Chromic acid, very dilute, - to harden tissues.

8. Solution of potash, saturated, and dilute (1 to 10).

9. Solution of soda, 25 grs. of fused soda in 1 oz.

10. Ammonia (1 part of the strongest solution to 3 of water).

11. Nitrate of baryta, a cold saturated solution of.

12. Nitrate of silver (120 grs. in 2 oz.). These two are tests for the mineral acids.

13. Oxalate of ammonia, in solution. Test for lime.

14. Solution of iodine saturated, i. e. 1 to 7000 water. Another solution is, 1 gr. of iodine, 3 of iodide of potassium, in 1 oz. of distilled water.