144 



UNDER DKAIMNG FOR IIEDGES. 



agreeable irritation. The aromatic vine- 

 gar is prepared with tarragon; the smell 

 is agreeable, but it has the same fault as 

 the former. The vinious vinegar is 

 formed by adding some alcohol to simple 

 vinegar; it has a very sensible odor of 

 acetic ether; the alcohol softens the flavor 

 in some degree, but the vinegar is still 

 very sharp. The acid called strong vine- 

 gar, is in fact a very good acetic acid at 

 10i° hydr., it is very white clear, and 

 sharp, without the usual burnt flavor, and 

 seems to form the basis of the preceding 

 kinds. It can be sold for eight or nine 

 francs (seven shillings) per pound, which 

 is only half the price of that distilled from 

 verdigris Although not so agreeable 



o o o 



to the taste as common vinegar, these 

 new kinds are more elegant to the eye, 

 and do not mother. 



Carbonate of soda, perfectly white and 

 transparent, is made at the same estab- 

 lishment. 



Impure acetate of alumina is also pro- 

 duced. 



Acetate of soda, in well formed, ver}^ 

 white, and pure crystals. 



Acetate of copper, crystallized in small 

 grains, more brilliant than common verdi- 

 gris. It is also soluble in water, and 

 much cheaper than that in present use. 



Acetate of barytes, perfectly pure; it 

 would be preferable to acetate of lime for 

 preparing acetate of alumine, if it were 

 not too dear. 



Muriate of alumine is said to be pre- 



ferable to alum in dying, but that pre- 

 pared by Messrs. Mollerat is excessively 

 acid, and contains lime and oxide of iron, 

 which renders it useless in many cases. 



Oxide of zinc, of a dirty white, and 

 containing oxide of iron, and a little car- 

 bonic acid, which it appears to have ab- 

 sorbed after it was calcined. 



Carbonate of zinc, rather whiter, but 



which also contains some iron, although 



... ® 



the carbonic acid hides its color. 



Both of the last substances might be 

 used by painters instead of white lead. 



Besides the above, the proprietors in- 

 tend to make white lead, and also sugar 

 of lead. 



A cubic metre (yard) of wood yields 

 100 litres (quarts) of acid liquor. 



Besides the above, 25 or 30 killo- 

 grammes (50 or 60 pounds) of thick oil. 

 *8.nn. de Chim. 



REMEDY FOR POTATO CURL. 



To prevent this disease, spread hot 

 lime upon the land before planting the 

 potatoes. Soot is also recommended. 



UNDER DRAINING FOR HEDGES. 



Where the soil is heavy, wet, and com- 

 posed of clay, it is stated than an under- 

 drain beneath the line where the sets are 

 planted is of great service, and where old 

 hedges want improving in such soils it is 

 recommended to pass drains underneath 

 them at no very great distance, in a cross 

 direction. 



CONTENTS OF. NO. 9. VOL. X. 



Dcyerlein'sMethodof making Brick, Tiles, &c., . 129 

 Method of Applying a Filtering-Stone for Purify- 

 ing water, 130 



The Effect of Temperature in Preserving Vege- 

 tables, 130 



Poppy, a Preventive of the Wheat Fly, . . . 130 

 Useful effects of Iodine as a Medicine, . . . 130 

 Medicinal Properties of Iron, ...... 130 



Action of Sulphur on Iron, 131 



Soft Iron that will Cut hardened Steel, . . . 131 

 To whiten Ivory that has become Red or Yellow, 131 

 Phenomena Observed in Proving the Strength of 



Iron Bars, 131 



Sir H. Davy's Agricultural Chemistry, . . . 132 

 A new Species of Roof, 135 



OF OBSERVER AND RECORD. 



Manganese used in the Manufacture of Iron and 



Steel, 135 



On Propagating Fruit Trees, by Abscision, . . 135 



False Gilding and White- Washing, .... 136 



On the Preservation of Animal Substances, . 136 

 Causes of the decay of Wood, and the Means of 



Preventing it, 136 



Description of a Forcing (hot) house, . . . 136 



On a Method of Training Fruit Trees, . . . 157 



Definition of Terms. Letter G., 139 



On Planting Trees, 141 



Syrup, Brown, or White Sugar from Grapes, . 142 



Charcoal Manufactured in close Vessels, . . . 143 



Remedy for Potato Curl, 144 



Under Draining for Hedges 144 



