678 PHILOSOPHICAL TRANSACTIONS. [aNNO 1723. 



with nutmeg, mace, cloves, and other aromatics, whereby the inordinate 

 action was for that time quieted; but on repeating it another time the 

 experiment failed. 



Ejusdem Firi Clarissimi ad eundem Epistola posthuma. De Generatione Anima^ 

 Hum,* et de Palpitatione Diaphragmatis. N° 380, p. 438. 



A Botanical Description of the Flower and Seed Vessel of the Plant, called 

 Crocus Autumnalis Sativus, that produces the true English Saffron of the Shops. 

 By Dr. James Douglas, F. R. S. N° 380, p. 441 . 



This plant being so well known, the botanical description given by Dr. 

 Douglas is at present of no importance. ..:.... 



Some Account of Mr. Leuwenhoeck's curious Microscopes, lately presented to the 

 Royal Society. By Martin Folkes, Esq. V. P. R. S. N° 380, p. 446. 



It is more than 50 years since the late Mr. Leuwenhoeck first began his cor- 

 respondence with the Royal Society, when he was recommended by Dr. De 

 Graaf, as a person already considerable by his microscopical discoveries, made 

 with glasses contrived by himself, and excelling even those of the famous 

 Eustachio Divini. And as he has ever since that time applied himself, with the 

 greatest diligence and success, to such observations, no doubt can be made of 

 the excellency of those instruments he so long used, so much improved, and 

 on the fullest experience so often commended in his letters; great part of 

 which, at his decease, he thought fit to bequeath to this Society. 



The legacy consists of a small Indian cabinet, in the drawers of which are 

 13 little boxes or cases, each containing two microscopes, handsomely fitted up 

 in silver, all which, not only the glasses, but also the apparatus for managing 

 them, were made by Mr. L's own hands ; besides which, they seem to have 

 been put in order in the cabinet by himself, as he designed them to be presented 

 to the Royal Society, each microscope having had an object placed before it, 

 and the whole being accompanied with a register of the same, in his own hand- 

 writing, being desirous the gentlemen of the Society might easily examine 

 many of those objects, on which he had made the most considerable dis- 

 coveries. 



• A fall accotint of Mr. L's discovery of animalcula in semine masculino, and of his theory of 

 generation founded thereon, has been inserted in some of the preceding vols, of tliis abridgment. 



