VOL. XVII.] PHILOSOPHICAL TRANSACTIONS. 50Q 



ment without a standard, or to make two of them to agree artificially without 

 comparing them together. 



I thought to have finished this discourse with showing a method of construct- 

 ing and regulating thermometers to the best advantage ; but finding it necessary 

 to make some experiments with more accuracy than I have yet done, especially 

 on the air's expansions ; I crave leave, till one of the next transactions, to 

 inform myself more fully in the matter, being unwilling to leave to the trial of 

 others, what perhaps I have better opportunity to examine myself, especially in 

 what is most difficult in this nice affair. I shall only propose, that whereas the 

 usual thermometers with spirit of wine, do some of them begin their degrees 

 from a point, which is that where the spirit stands when it is so cold as to freeze 

 oil of aniseeds ; and others from the point of beginning to freeze water ; I 

 conceive these points are not so justly determinable, but with a considerable 

 latitude : and that the just beginning of the scales of heat and cold should not 

 be from such a point as freezes any thing, but rather from temperature, such 

 as is in places deep under ground ; where the heat of the summer, or cold in 

 winter, have been found to have no manner of effect. 



Account of a Booh, viz. — Nova Hypotheseos, ad explicanda Febrium inlermit- 

 tentium Symptomata et Typos excogilatce Hypotyposis. Unct cum JEtiologid 

 Remediorum ; speciatim vero de Curatione per Corticem Peruvianum. ^ccessit 

 Dissertatiuncula de Inlestinorum Motu Peristaltico. Authore Guilielmo Cole, 

 M.D. Lond.inSvo. 1693. N° 197, p. 657. 



This author supposes the paroxysms of intermitting fevers to be produced 

 by " a matter at first inoflfensive (but afterwards maturating into a fermenta- 

 tive, acrimonious substance) admitted into the roots of the nerves in the 

 cortical part of the brain, from them propelled into the medullary part, and 

 thence into the tracts of the nerves and fibres, which he takes to be but 

 propagines nervorum." After endeavouring to establish this hypothesis, he 

 proceeds to consider the different types of intermittents, with the method 01 

 cure, introducing many observations on the Peruvian bark. 



The subjoined discourse concerning the spiral fibres of the intestines, is a 

 Latin translation of the English paper on this subject, inserted in N° 123, 

 of the Philosophical Transactions, and reprinted in Vol. II. p. 295, of these 

 Abridgments. 



