Copy extract of a letter from Anthoni van Leeuwenhoek to the Royal Society ' Containing his Observtions on the Seeds of Cotton, Palm or Date stones, Cloves, Nutmegs, Gooseberries, Current, Tulips, Cassia, Lime-tree; On the Skin of ht Hand, and Pores, of Sweat, the crystalline Humour, Optic Nervem Gall and Scales of Fish: and the Figures os Several Salt Satuler, etc. ' Includes sheet of engravings Nos 1 to 16 from Philosophical Transactions 205 1686