The Chinese consider the provinces of Kwangtung, Kwangsí, and Yunnan to be the most unhealthy of the eighteen, and for this reason employ them as places of banishment for criminals from the north-eastern districts. The central portions of the country are on some accounts the most bracing, not so liable to sudden changes as the coast, nor so cold as the western and northern districts. Sz’chuen and Kweichau are cooler than Fuhkien and Chehkiang, owing to the mountains in and upon their borders. ~RAIN-FALL ON CHINESE AND AMERICAN COASTS.~ The marked contrast between the Chinese and American coasts in regard to rain is doubtless owing, in a great degree, to the outlying islands from Formosa to Sagalien on the former, whose high mountains arrest the clouds in their progress inland. The _Kuro-siwo_, being outside of them, allows a far greater mass of cold water between it and the shore on the Chinese, than is the case on the Atlantic coast, and renders it the colder of the two by nearly eight degrees of latitude, if isothermal lines alone are regarded. This mass of cold water, having less evaporation, deprives the maritime provinces of rain in diminishing supply as one goes north along the skirts of the Plain, until the Chang-peh shan are reached. The rains which fall in the western provinces and the slopes of the Bayan kara Mountains, coming up from the Indian Ocean during the south-west monsoon, fall in decreasing quantities as the clouds are driven north-east across the basins of the Yangtsz’ and Yellow rivers. In the western part of Kansuh the humidity covers the mountains with more vegetation than further east, toward the ocean. Snow falls as late as June, and frosts occur in every month of the year. The enormous elevation of the western side of China near Tibet, the absence of an expanse of water like the great lakes, and the bareness of the mountains north of the Mei ling, account for much of this difference between the United States and China; but more extended data are needed for accurate deductions. The fall of rain at Canton is 70 inches annually, which is the mean of sixteen years’ observation. Ninety inches was registered during one of these years. Nearly one-half of the whole falls during May, June, and September. The average at Shanghai for four years was 36 inches. No observations are recorded for the valley of the Yangtsz’. Near the edge of the Plateau the rainfall averages 16 inches in the province of Chihlí, and rather more in Shansí and Shantung, where moisture is attracted by the mountains. More than three-fourths of the rain falls during the ten weeks ending August 31st. Snow seldom remains on the level over a fortnight. ~TYFOONS.~