ANIMAL CHEMISTRY. 



LECTUEE I. 



Introductory remarks on recently established general principles in che- 

 mistry Statical chemistry concerned only with the composition of parts ; 

 with the different kinds of matter of which all the tissues and fluids of 

 the body are composed Dynamical chemistry concerned with the changes 

 of composition undergone by various parts from time to time Physical 

 changes, as of a piece of iron, contrasted with its chemical changes 

 Special reference of chemistry to past and future states of bodies Every 

 action of living body attended by changes of chemical composition 

 Eecent advances in chemistry of tissue-products Leucine a result of the 

 natural metamorphosis of glandular tissue Its artificial formation, de- 

 structively and constructively Taurine a constituent of bile, &c. Its 

 artificial production from carbon, hydrogen, nitrogen, oxygen, and sulphur 

 Chemical types of construction and double decomposition Compounds 

 of hydrogen with other three gaseous elements Establishment of mole- 

 cular formulae for hydrochloric acid HC1, water H a O, and ammonia H 3 N 

 Existence in two volumes of gaseous hydrochloric acid, water, and ammonia, 

 of one, two, and three volumes of hydrogen respectively, in addition to 

 one volume of chlorine, or oxygen, or nitrogen Monhydrides, dihydrides, 

 and trihydrides in general, and their derived chlorides Existence of 

 analogous mono-, di-, and tri-chlorides of metals deduced from specific 

 heats of respective metals, &c. Mutual relations of chlorides, hydrates, 

 and amides, both of elements and groupings Interchangeability of com- 

 parable residues (Cl from HC1, HO from H.HO, and H 2 N from H.H Z N) 

 in great variety of compounds Chlorinated, hydrated, and ammoniated 

 forms of the same primitive bodies Many complex nitrogenous tissue- 

 products only the ammoniated forms of comparatively simple bodies 

 Urea, glycocine, and taurine the ammoniated forms of the carbonic, acetic 

 or glycolic, and isethionic acids respectively Mixed hydrate-amides. 



