21& ON A METEOROLOGICAL NOMENCLATURE. 



Vienna : but it is said, that they cannot take oft' above fire 

 hundred impressions. This must be owing to the nature of 

 the stone employed, which is procured from Verona, 

 neb mode. Chauvron, the first who set up a chemical printing office 

 at Paris, after having traced the design on stone with a resi- 

 nous ink, merely wets it with water, and wipes off the water 

 from the design. Printing ink is then applied by beating 

 in the common way with balls; and, as this does not adhere 

 to the wet stone, the resinous strokes only produce an im- 

 pression. Chauvron is said to have printed a great deal of 

 music in this way. 

 Ua» of nitric ^ e must observe, that, where nitric acid is not used, 

 ****• the prints will never be so fine, and so many impressions 



cannot be taken off. The use of nitric acid therefore can- 

 not be too strongly recommended. 



XL 



Observations on Dr. Bostock's Remarks upon Meteorology, 

 by Luke Howard, Esq, 



To WILLIAM NICHOLSON. 

 Respected Friend, 



Natural histo- -***T is about eight years since I brought forward an essay 

 ry and nomen- containing the Natural History of the Clouds, with a no- 

 cloud^ C menclature formed chiefly from their visible structure. 

 This work, imperfect as it was, met with a favourable recep- 

 tion. In the Annual Review for 1804, Dr. Bostock be- 

 stowed upon it a pretty long critique, on the whole favour- 

 able to the adoption of the nomenclature, but which he seems 

 to have since forgotten. He now says, " I am not unaware, 

 that a scientific nomenclature for the appearance of the 

 Nomenclature clouds has been attempted by Mr. Howard, but I hope I 

 objected to. shall not be accused of presumption, if I give it as my opi- 

 nion, that his set of names is much too confined to be of 

 any great use, and that the hypothesis oa wluch he proceed* 

 is not entirely correct." 



There 



