VOL. XI.] PHILOSOPHICAL TRANSACTIONS. 321 



II. Th. Bartholinus de Peregrinatione Medica, &c. Hafniae, 1674, in fol. 

 A treatise sliowing tiie advantages of foreign travel to the physician and na- 

 turalist. 



III. Georgii Hieronymi Velschii Hecatosteae II. Observationum Physico 

 Medicarum. Augustas Vindelicorum. 1675. 



IV. Joh. Nicolai Pechlinii,* M.D, &c. de Aeriset Alimenti Defectu, et Vita 

 sub Aquis Meditatio. Kiloni, 1676, in 8vo. 



This author having received out of Sweden a very extraordinary relation about 

 a man drowned under ice, and revived after 16 hours time, takes thence occa- 

 sion to discourse, in this tract in general, how far air and aliment are necessary 

 to the life of vegetables and animals. He begins with vegetables, and examines 

 the necessity of air and water to preserve them alive. Where he observes the 

 obscure degree of life in bulbs and roots during winter; as also the cause of the 

 distinction of life in annual and perennial plants; with the hasty growth of some 

 vegetables. Proceeding to animals, he inquires first into the life of insects, 

 and their apparent death in winter, which he esteems not to be without a re- 

 mainder of the principle of life, as also into the changes of some of them into 

 aurelias and butterflies. Here he takes notice, after Malpighi, of those ex- 

 ceedingly minute tubes in silk-worms, through which the air passes and carries 

 on the motion of the liquor in their annular fibres. Next he explains, how the 

 same alteration of life and death holds in birds, particularly in swallows and 

 storks, that is found in insects; and takes notice of the swallows immerging 

 themselves under the water on the sides of the Baltic sea, and remaining there 

 all winter, and reviving again in the spring, flying about upon their being taken 

 up in winter, and brought into a hot stove. 



Thirdly, he attempts to show, why fishes cannot live long in the open air, 

 partly because the current of the air is more impetuous than the nature of fishes 

 will bear; partly, because the motion of the air carries off that viscous moisture 

 which overlays their outside: partly also because the motion of their fins, by 

 which the blood is made to circulate in them, having no place in the free air, 

 the blood must needs stagnate in that element ; though some fishes, especially 



* This expert anatomist and distinguished medical writer was bom at Leyden, in l6^6. He held 

 the professorship of physic at Kiel, and was chief physician to the Duke of Holstein. He died in 

 17065 aged 60. In his treatise de Purgant. Med. Facultatibus, (which contains many excellent ob- 

 servations) he has described more accurately than had been done by preceding authors, tlie villous 

 coat of the intestines, the intestinal glands, &c. This, with his Dissertations de Fabrica et Us 

 Cordis, and his Observat, Physico-Medicarum Libri III. are among his most valuable works. Be- 

 sides the above-mentioned tract, he also wrote de Habituet Colore iEthiopum ; and he is moreover sup- 

 posed to have been the author of a satirical piece against Sylvius and de Graaf, entitled Metamor- 

 phosis iEsculapii et Apoilinis Pancreatici. 



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