Specific gravities in com- 

 parison with a bulk 

 of water equal to 820 

 grains. 

 Acids, Oil of vitriol 1510 , 

 Spirit of nitre 1166 

 Aqua regis. . 987 . 

 Aquafortis 1157. 

 Aqua regis from") 



aquafortis and > 1034 . 

 sal ammoniac J 

 Butter of antimony 1976 , 

 Spirit of raw silk 916 

 Spirit of honey .. 7l6 

 Tine, of antimony 693 . 

 Jesuit's bark . . . 720 , 



Bals. tolu 717 



Gum ammoniacum 719 



Metals 713 



Vitreous humour "> 

 of an ox's eye J 

 Crystalline hu 

 mour of the ox 

 eye 

 White of a hen's egg 

 Jelly of hartshorn 

 Human saliva 

 Human urine 

 French brandy 



} 



[anno 1710. 



Angle of Ratio of 

 observation, refiraction, 

 as 10000 is to 



..•21° 56' 7011.5 



...20 50 7104 



...19 50 7195 



.-.20 40 7120.5 



...20 10 7161.5 



...40 5941.3 



...20 30 7135 



. ... 16 50. ... as water 



• .. 18 46 7294.3 



... 18 46 as tine, of ant. 



..-19 34 7219,3 



...19 10 7257.3 



....18 54 7281.7 



16 50. . . . as water 



24 10 6832.7 



17 40 7401.3 



17 50 7384.7 



16 50 as water 



17 5 7451.9 



18 20 7338.6 



Oil of turpentine strongly tinged green, with filings of brass, nowise alters 

 its refraction. 



y4n Account of a Book intitled, Dissertatio Epistolaris de Glandulis conglohatis 

 Durce Meningis humancey indeque ortis Lymphaticis ad Piam Meningem pro- 

 ductis. Authore Antonio Pacchiono. Romce 1/05, Sz'O. N° 328, p. 208. 



This dissertation seems to be only a supplement, or appendix, to a treatise 

 of the Dura Mater, which Pacchionus had published some time before. In 

 this, his chief design is to inquire into the service, and find out the origin of 

 that humour, which moistens the brain and its membranes, in every dead 

 animal. 



In examining the cavity of the longitudinal sinus, immediately under its 

 membranous expansions, in the area or middle of its cordae, mentioned by Dr. 

 Willis, that is, the small transverse fibres, which like ropes keep the walls of 

 this sinus from being over dilated by the influent blood, our author had the 

 good fortune to discover a great number of conglobate glands, which are all 

 contained by a fine and proper membrane, as in a bag. For the most part they 



