Some of these are used with types; others with a clean quill pen.

1. Sulphate of manganese 1 dr., water 1 dr., powdered sugar 2 drs., lamp-black 1/2 dr. Triturate them together, and stamp in on the linen with types. When dry, wash the part with liquor potassAe; again dry, and wash with plenty of water.

2. Dr. Smellie's. Sulphate of iron 1 dr., linseed oil 1 oz.; vermillion 1/2 oz.: grind perfectly smooth. Printers' ink is also used with type.

3. Heat to redness equal weights of black oxide of manganese and caustic potash, and mix it with an equal weight of pipe-clay, and sufficient water to give it a due consistence. To be applied with types or stencils. It becomes brown, and does not wash out. The following are used with a quill pen:

4. Nitrate of silver 100 grs., distilled water 1 oz., gum arabic 2 drs., sap green a scruple: dissolve. The linen is first to be wetted with the following pounce, dried and rubbed smooth, then written on by a clean quill or bone pen dipped in the ink. Pounce or Mordant. Sub-carbonate of soda 1 oz., water 8 oz. [A great variety of recipes might be given, slightly differing from the above in the proportion of the ingredients, and in the colouring matter. Gray directs 2 drs. of nitrate of silver, 6 drs. of water, and 2 of mucilage, and a pounce of 1 oz. of sub-carbonate of soda in 16 of water, with a little sap green. Another form is - nitrate of silver 1 oz., distilled water 5 oz., powdered gum 1 1/4 oz., sap green sufficient to colour it. The linen to be first wetted with the following preparation: - Subcarbonate of soda 1 oz., water 6 oz., gum 1 oz.; dissolve. Some add a little powdered bole to the preparation; the object in colouring it being merely that the part which has been wetted may be more readily distinguished. The quantity of nitrate of silver should not be much less than 100 grs. in an ounce of ink; the proportion of the other ingredients is of less importance. Some direct the addition of a drop or two of nitric acid.]

5. Italian. Moisten the linen with a solution of recently prepared chloride of tin, and write with a neutral solution of salt of gold.

Marking Ink, without Preparation, These inks merely require to have a hot iron passed over the part written on, and to he held pretty near the fire till the writing assumes a dark colour.

1. Nitrate of silver 3 drs., water 1 1/2 oz.; dissolve, and add as much strong liquid ammonia as will redissolve the precipitate formed by it; add 2 drs. of mucilage, a little sap green, and water, if required, to make up the men-sure to 2 oz. A little ivory-black, Indian ink, or indigo, is sometimes used to colour it. Some recipes contain nitrate of copper in addition to nitrate of silver. Several recipes might he given, but they will all probably be superseded by Mr. Redwood's. [In operating with ammonia and nitrate of silver, fulminating silver is sometimes unexpectedly formed, and may prove a source of danger. Perhaps in this respect, as well as others, Mr. Redwood's preparation claims a preference.]

2. Mr. Redwood's. Rub together 1 oz. nitrate of silver, and 1 oz. of bitartrate of potash; add 4 oz. of liquor ammonia?, and when dissolved mix in 6 drs. of white sugar, 10 drs. of powdered gum arabic, 1/2 oz of archil, and water to make up 6 oz. by measure. [Instead of archil, 1/4 oz. of sap green may be used to colour the ink; or 40 grs. of fine vegetable black, previously triturated with a little water or mucilage.]

3. Rev. J. B. Reade's patent. This differs from the last in using tartaric acid instead of bitartrate of potash. The quantities may be 1 oz. of nitrate of silver, 3 drs of tartaric acid, and the above quantities of the other ingredients. The use of tartaric acid he claims an exclusive right to.

4. Add to the last an ammoniacal solution of an oxide or salt of gold. - Reade. [This addition prevents its being acted on by cyanide of potassium, and some other agents which the silver ink fails to resist.]

5. Aniline Black, Marking Ink. The ink is prepared by means of two solutions, one of copper, the other of aniline, prepared as follows:

(1.) Copper Solution. 8.52 grams of crystallized chloride of copper, 10.65 grams of chlorate of soda, and 5'35 grams of chloride of ammonium, are dissolved in 60 grams of water.

(2.) Aniline Solution. 20 grams of hydrochlorate of aniline are dissolved in 30 grams of distilled water, and to this are added 20 grams of solution of gum arabic (1 part of gum to 2 of water), and 10 grams of glycerine.

By mixing in the cold 4 parts of the aniline solution with 1 part of the copper solution, a greenish liquid is obtained, which can be employed directly for the marking; but as this liquid can only be preserved for a few days without decomposition it is advisable to keep the solution separately, until the ink is required for use. The ink may be used either with a pen or a stencil plate and brush; if it do not flow freely from the pen it may be diluted with a little water without fear of weakening the intensity of the colour. At first the writing appears of a pale green colour, but after exposure to the air it becomes black; or it may be changed to a black colour immediately by passing a hot iron over the back of the fabric, or heating it over the flame of a spirit lamp. As, however, a dry heat is apt to make the fibre saturated with the ink brittle, it is preferable to hold the marked fabric over a vessel containing water in full ebullition; the heat of the vapour is sufficient to determine almost immediately the reaction by which aniline black is formed. After the steaming the writing should be washed in hot soapsuds, which gives the ink a fine blue shade. The ink is not acted on by acids or alkalies, and if care be taken that the fibres are well saturated with it, there is no danger of its being removed by washing. - Dingler's Journal.

6. In addition to the above recipes, the following of M. Henry may deserve attention in large establishments where economy is an object: - Take 1 oz of iron filings and 3 oz. of vinegar, or diluted acetic acid. Mix the filings with half the vinegar, and agitate them continually until the mixture becomes thick, then add the rest of the vinegar and 1 oz. of water. Apply heat to assist the action; and when the iron is dissolved, add 3 oz. of sulphate of iron, and 1 oz. of gum previously dissolved in 4 oz. of water; and mix the whole with a gentle heat. To be used with brush and stencil plates.