424 



has not, as in striated muscle, a special terminal apparatus, 

 but hundreds of fibres depend upon a single one of these. 



Terminations of Nerves in Salivary Glaiids. — Krause 

 (Reichert and du Bois Reymond's 'Archiv,' 1870, p. 9) has 

 examined the structure of salivary glands with especial refer- 

 ence to the terminations of nerves and their connection with 

 secreting-cells described by Pfliiger, and has not been able 

 to confirm his observations. Krause could in two glands 

 only trace medullated fibres into the proper gland substance, 

 and here they ended in terminal capsules or clubs. He was 

 never able to establish with certainty the connection of 

 medullated fibre with an acinus; and draws attention to the 

 many sources of error which attach to the employment of 

 olmic acid, a reagent which colours many other structures 

 beside nerve-fibres, as well as of chromic acid. With refer- 

 ence to the termination of non-medullated fibres he could 

 not arrive at any certain results. Krause's method of inves- 

 tigation consisted in immersing the perfectly fresh glands in 

 a five per cent, solution of neutral molybdate of ammonia. 



Saliva7'y Glands. — Ewald (Inaugural Dissertation, Ber- 

 lin, 1870, 'Med. Centralblatt,' No. 24, p. 373) publishes some 

 observations on the difierence in tlie histology of salivary 

 glands according as they have or have not been stimulated. 

 He finds the difference (previously observed by Haidenhain) 

 to depend merely on the absence of mucin from the latter, 



Flacenta. — Langhans (' Med. Centralblatt,' 1870, p. 470; 

 'Archiv f iir Gynakologie,' I, 317) gives a somewhat new view 

 of the structure of the placenta. The foetal tufts, even sortie 

 as thick as 1 mm., penetrate the maternal tissue, and losing 

 their epithelial covering, become intimately united with it. 

 The union is not, however, everywhere so close as this. 

 Even when the epithelium is quite Avanting, the foetal and 

 maternal parts can always be clearly distinguished by their 

 structure. This close union does not take place till the later 

 months of pregnancy ; and as late as the sixteenth or twen- 

 tieth week the foetal tufts showed a clear and continuous 

 covering of epithelium. 



Inflammation . — M. Feltz has addressed to tlie French 

 Academy of Sciences ('Comptes Rendus,' June 6th, 1870) a 

 short accoun t of observations on iufiammation , in which he states 

 that he has failed to see the passage of white corpuscles through 

 vascular walls described by Cohnheim. In inflammation of 

 the peritoneum he has convinced himself that the leucocytes 

 are not, at all events, produced by proliferation of the epithe- 

 lium ; but in inflammation of the cornea, the connective tissue 

 corpuscles may give rise to new elements which assume the 

 form of leucocytes. 



