28 The Microscope. 



physical irritation or mental excitement. He divides the hair bulbs 

 into three groups, viz. : (a) If, in healthy conditions of the body and 

 mind, the hairs that fall out daily are examined microscopically by 

 polarized light, the enlarged bulbous end of the root will show a 

 white contom- and a yellowish or brownish-red center, (b) In all 

 irritable conditions of moderate grade, all painful conditions of any 

 organ, also in emotional disturbances of moderate grade without any 

 apparent bodily disease, the bulbous end of the hair-root increases 

 in length and breadth, the central paii appears under polarized 

 light of a violet, blue, or bluish-green color, separated from the 

 white contour by bands of yellow and red. (c) In higher grades of 

 bodily disease or mental disturbance, the bulb becomes still larger, 

 and the bluish centre changes to green, yellow, or orange. The 

 main conclusion to be arrived at is that emotional disturbances or 

 bodily disease influence circulation to such an extent as to give rise 

 to changes in the nutrition and pigmentation of the hair. — Neuro- 

 logical Review. 



NEWS AND NOTES. 



The recorded number of plant-genera of Australia is 2248. 



The Scientific American says that insects may be preserved 

 dry for microscopical purposes by dipping them in a solution of cor- 

 rosive sublimate. 



The histological collection of the Museum of the Royal College of 

 Surgeons of England contains upwards of 12,000 specimens, all ar- 

 ranged and catalogued so as to be readily available for reference. 

 The nu.mber of slides in the original Hunterian collection is 215. 



F. Lynnwood Garrisok contributes to the August Journal of 

 ihe Franldin Institute, a paper on the microscopical structure of 

 car-wheel iron. 



M. Galippe has related to the Paris Academy of Medicine the 

 discovery of e, new fungus composed of tubes and spores of myce- 

 lium developed in the human saliva. It belongs to the Moniliae 

 family, and M. Galippe has given it the name of Monilia sputicola. 



Among the papers read at the 59th annual meeting of the As- 

 sociation of German Naturalists was one by Dr. Lehmann on the 

 microscope as an aid to physical investigation. 



Dr. Kartulis, of Alexandria, Egypt, claims that the giant 

 Amoebae are the specific cause of dysentery. 



