INDEX. 447 



Mac CuUoch (Dr.) observations of on the varieties and forma- 

 tion of pitchstone, 41-50— synopsis of its varieties, 51 — 

 simple pitchstone, 51— porphyritic, 52— concretionary-sphe- 

 roidal pearlstone, 52, 53 — amygdaloidal, 53— on the defects 

 of the existing charts of the Shetland isles, 206-229 

 Mackenzie (Colin) review of One Thousand Chemical Experi- 

 mentshy, 354 — strictures on his want of order, 356-358 — spe- 

 cimens of his incorrectness, 358-363 

 Madder-lnkc, notice of a newly invented one, 169 

 Magnesia and its carbonate, solubility of, in water, 407 

 Magnetic Attractions, experiments for determining- the law of, 



335-338 

 Magnetism, observations on some new electro-magnetical mo- 

 tions, and on the theory of, 74-96— magnetic phenomena 

 produced by electricity, 126— magnetism produced by 

 electricity, 185,186 — production of magnetism, 414 — electro- 

 magnetic rotation, 415 — note on some new electro-magnetical 

 motions, 416-421. (See Electricity.) 

 Maio (Signor) notice of ancient MSS. discovered by, 193 

 MalacoUte, analyses of, 329 



Manatee, how distinguished from the dugong, 375 

 Manures, abstract of a dissertation on, 332, 333 — notice cf the 



alkalino-vegetablepoudrettes of Madame Dubout, 334 

 Mechanical Science, miscellaneous intelligence in, 168, 169, 



402-407 

 Medicine, on the use of iodine in, 187, 188 — of nitrate of 



silver, 189— of chlorine, 190 

 Medico-Chirurgical Society, notice of the formation of, 194 

 Meteoric Stones, analyses of, 329-331, 410, 411 

 Me/eoro^«to, observations on, 192 



Meteorological Observations for one year, 97-111 — remarks 

 (with tables) on the weather and seasons of the years 

 1819-20 and 1820-21, 111-114 

 Micrometer, made of rock crystal, account of, 131, 132 

 Milk, hint for the preservation of, 406 

 Mineral Substance, new, notice of, 191 — analysis of, see 



Analysis. 

 Mineral Waters, on the sulphureous nitrogen in, 409, 410 

 Miscellaneous intelligence in Science and the Arts, 168-194, 



402-432 

 Molybdenum, on the compounds of, 171, 172 

 Monte Nuovo, account of the rise of in 1588, 424, 425 

 Moon, notice of a volcanic appearance in, 133 

 Morlnnd (Mr. Samuel) the inventor of the steam-engine, 193, 



194 

 Mud Volcanoes in bogs, notice of, 427 



Muriatic Acid, on the constitution of at different densities, 

 287-291 



