3Q0 PHILOSOPHICAL TRANSACTIONS. [aNNO l66g, 



solid and ponderous, which seems to be made up of a conflux of divers minerals 

 melted together. 



Thirdly, a piece of sal ammoniac, and several pieces of sandever, besides 

 those moist vitriolate ashes above mentioned. 



The fire spread about 3 miles in breadth, and 1 7 miles in length ; the same 

 being now quite extinct, except that in the clefts or hollows of the rocks of 

 sciarri some still remains glowing. 



Sojne Observations concerning the Organs of Generation, made by Dr. 

 Edmund King, F. R. S. and by Dr. Regnerus de Graeff, Physi- 

 cian in Holland; which latter occasioned the Publication of the former. 

 N" 52, p. 1043. 



The observations of the former (Dr. King) as he presented them in writing 

 to the Royal Society, the 17th of December l668, were as follow: 



About 3 weeks since I produced the testiculos cuniculorum marium dissected 

 In several shapes ; which appeared to several of this illustrious company, as well 

 as to myself, to be indeed made up of vessels ; and I then had particularly 

 shown them to Mr. Hook and some others, and the manner how they lay. 

 And being desired to give in the account in writing, I cannot but affirm here, 

 that I find the vessels in the testes of this kind of animals to lie in round folds, 

 in the manner of the little intestines, but both ends of each roll meeting at 

 their insertion, which seems to be made into the ductus nervosus : and every 

 one of these little rolls are very curiously embroidered with other vessels, which 

 I judge to be veins and arteries by reason of their reddish colour, appearing in 

 them even to the bare eye. 



These little rolls lie in ranges, having a kind of uniformity not unpleasant to 

 behold by a good light. But I do not mean, that every one of these rolls is 

 one entire tube, but consists of many tubes, besides the said embroidery of 

 veins and arteries : for, when I cut one of the said rolls transverse, there 

 seemed to me 5, 6, or more distinct tubes in one roll, contained as it were 

 in one common membranula ; but the fine texture and tenderness of them is 

 such, that they will not admit of expansion in such a manner as some other 

 testes will, and especially as that of a rat is said to do by Dr. de GraefF; yet if 

 it shall appear that they are really made up of vessels, though of ever so many 

 sorts, I humbly conceive you will not think the experiment lost, because I sup- 

 pose the chief thing intended by these trials to be, that it may be well known 

 what indeed the body of the testes is made of; whether indeed it be a con- 

 geries of vessels and liquors without any intermediate substance, as was asserted 



