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acid alfo alkali alſo animal appears arifes atmoſphere becauſe bodies cafe calcined caufe cauſe colouring matter colouring particles confequence confiderable confift conftitution copper courſe denfity diffolved diftilled diminiſhed eſtabliſhed experiments faid falt fame fays fcience feems fermentation feven feveral fhall fhew fhould filver fimilar firſt fixed air fluids fmall folid folution fome fpirit ftate ftill fubftances fubject fuch fuffer fufficient fuperior fuppofed furface glafs glaſs himſelf hydrometer increaſe inflammable inftances inftrument infufed infufion infuſed itſelf leaſt lefs light maffes metallic moft moſt muſt nature neceffary nitre Nitrous Acid obfervations occafion opake orange colour Orichalcum paffage paffing pellucid perfons philofopher phlogifton phlogiſtic plants Pliny prefent puniſhments purpoſe quantity rays reafon Red Black refemble reflected Sir Ifaac Newton ſmall Spirit of Wine ſtate thefe theſe thofe THOMAS PERCIVAL thoſe tinged tion tranfmitted Tranſparent uſed veffels vegetables whofe Yellow Black
Page 339 - During several of the summer months of the year 1783, when the effects of the sun's rays to heat the earth in these northern regions should have been the greatest, there existed a constant fog over all Europe and great part of North America. This fog was of a permanent nature ; it was dry, and the rays of the sun seemed to have little effect towards dissipating it, as they easily do a moist fog arising from water.
Page 340 - ... whose smoke might be attracted and retained by our earth; or whether it was the vast quantity of smoke, long continuing to issue during the summer from Hecla, in Iceland, and that other volcano which arose out of the sea near that island, which smoke might be spread by various winds over the northern part of the world, is yet uncertain.
Page 120 - But one the lofty follower of the sun, Sad when he sets, shuts up her yellow leaves, Drooping all night; and, when he warm returns, Points her enamour'd bosom to his ray.
Page 346 - Benedictine convent, without the least accident having happened to any one of the party. We imagined we had walked about two French leagues, and were...
Page 340 - Hence perhaps the winter of 1783-4, was more severe than any that had happened for many years. The cause of this universal fog is not yet ascertained. Whether it was adventitious to this earth, and merely a smoke proceeding from the consumption by fire of some of those great burning balls or globes which we happen to meet with in our...
Page 143 - ... fo that the light reflected " from the tinging particles may predominate. " In fuch cafes, the colour of the reflected light " will be apt to vary from that of the light
Page 349 - Paris was enlarged, the suburbs were insensibly built on the ancient quarries, so that, all that you see without is essentially wanting in the earth, for the foundation of the city : hence proceed the frightful cavities, which are at this time found under the houses in several quarters. They stand upon abysses. It would not require a very violent shock to throw back the stones to the place from whence they have been raised with so much difficulty. Eight men being swallowed up in a gulph one hundred...
Page 341 - ... summer fogs. Because, if found to be so, men might from such fogs conjecture the probability of a succeeding hard winter, and of the damage to be expected by the breaking up of frozen rivers in the spring; and take such measures as are possible and practicable to secure themselves and effects from the mischiefs that...
Page 92 - Fancy's flowers adorn, The soft amusement of the vacant mind ! He sleeps in dust...