Original Vaccine Pock Insf'dutlon. 359 



'B 



sc.rentibus, rccentioribus contra in alia omnia euntibus ; no- 

 vi^ experimentis, opt microscopii compositl curate nistituen- 

 dis, clici probanque cupit Societas : utruni omnino aMal- 

 picrhii, Grewii, du Hamelii, Mustebi, Hcdwiguque obser- 

 vauoaibus ac placilis standum sit, an vegctabihum natura 

 ab animali fabrica prorsus diftcrat, omnnioque vel tibra- 

 rum fibrillammque, quae Medici est sententia, vel cellula- 

 rum ac tubulorum ftissu tuhdairej contcxtu ac structura 



contineatur. 



" As physiologists have been of different and opposite 

 opinions respecting the vascular structure of vegetables, the 

 more antient maintaining, whilst some modern have denied, 

 its existence : the society are desirous that new microscopi- 

 cal experiments should be instituted, in order to decide by 

 them, whether the observations (jf Malpiglu, Grew, Du- 

 himel, Mastel, and Hcdwig, be ucll founded, or whether 

 the structure of vegetables be different in its nature from 

 that of animals, and composed of a peculiar and more sim- 

 ple oro-anization ; consisting, according to the opinion of 

 Casii-mr Medicus, of iibres and fibrils ; or, accordmg to 

 that of Mlrbel, of cellular and tubular texture [iissu tubu- 



Laire)." 1 r ,1 



At the same time regard is to be had to tac toliowmg 

 subordinate queries :— 1 Tllow many sorts of vessels can be 

 with certainty assuAied from the first pcnod of develope- 

 ment of the plant? and, in case ihey really exist,— 2. Arc 

 those vessels which are called spiral [vasa spiralm) them- 

 selves hollow? or do thev serve to form proper canals by 

 their spiral turns? and,' 3. How do both the fluids and 

 oases move in them ? 4. Do, according to^ Sprengel, the 

 spurious tracheae (treppen-gcinge) originate from the coali- 

 tion of these spiral iibres ? or, on the contrary, according 

 to Mirbel, do the latter take their origin from the hjrmer? 

 5. Do the alburnum {I'ai/biey) jmd ligneous fibres originate 

 from the spurious traches; or rather from original and pe- 

 culiar vessels, or from a vascular texture ? 



The premium is fiftv ducats, and the latest period for 

 receiving the observations is before the end oi September 

 IbUJ. 



ORIGIXAL VACCIXF. POCK INSTITUTION-. 



On Monday April 30th ult. there was a most respectable 

 and aoreeable annual meeting of the governors ot this In- 

 stilutron, established January 1800. Betore dinner the 

 earl of Cholmondelcy, the president, being m the chair, the 

 continuation of the report was read, of the investigation ot 

 Z 4 ^l»« 



