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necessary in the calcination, so as to produce what is called tgood colour. It is sold here at about 12s. or 14s. per cwt.
2. Blue Black. —Made chiefly of ivory black ; the other com-ponents are kept secret. It is used for water-colour painting onwalls; and, along with chalk, forms a grey.—It is sold at 20s.per cwt.
3. Francfort Black. —Scraps and sawings of ivory, obtainedfrom the comb-makers, and calcined, enter into the compositionof this black ; the other ingredient are also kept secret. It isused for copperplate printing on paper.—Its price is 80s. per cwt.
4. Copperplate Printers’ Ink. —Prepared from Franckfort black,and other materials.
5- Mineral Brown.—' Consists of an ochreous earth importedfrom Bristol, and well ground with coal-tar oil, and coal tar.This forms a cheap and good pigment for most purposes, parti-cularly out-door work. It is of a dark mahogany colour, and i«sold at 23s. 4d. per cwt.
The following articles of manufacture merit also to be noticed.
1. Black Lead Powder. —From that mineral (plumbago) gotfrom Cumberland, &c. It is employed in the composition ofcrucibles (for brass, copper, &c.), of which there has lately beenestablished a manufactory at Strathbungo near Glasgow . Thesevessels were formerly got from England.
2 Yeast, from malt, for bakers, is made at the Cudbear work,and liutherglen-bridge near Glasgow ; and thence sent to greatdistances, in small stout casks, having the bung kept in its placeby an iron strap across it.
3. Common Glue is prepared at many of the large towns, whereabundance of animal gelatinous substances can be cheaply pro-cured. Besides which, importations of them in a dried state,called Scrows (Scrolls), are frequently made from Ireland . Thebuffalo skins which cover those packages, called seroons of cot-,ton, have recently been employed in making a weak glutinousliquid, used by muslin weavers and winders, in sizing their yarn;and, for some kinds, is found to be very economical and advan-tageous.
4. Gunpowder. —There are very few works here for the manu-facture of this dangerous commodity. The first erected was atTemple in Mid Lothian, some years ago. Since then, two orthree more have followed, mostly in the same quarter.
There are also prepared, in different ppts of Scotland , oils,essences, and waters of peppermint, aniseed, pennyroyal, laven-der, rosemary, cinnamon, &c. spirits of hartshorn, and a greatvariety of other minor articles in medical chemistry; also var-nishes of different kinds, refined oils, blacking, &c.