232 APPENDIX. 



according to the nourishing material ; the fruit hypha 

 bears terminally a number of branched cylindrical cells, 

 from which chains of greenish conidia are developed 

 (Plate XXIX., Fig. 7). It is the commonest of all 

 moulds. 



Botrytis Bassiana. Hyphae and spores colour- 

 less. Hyphae usually simple, but sometimes united in 

 arborescent stems (Plate XXIX., Fig. 1 1). It is the 

 cause of muscardine, a fatal disease of silk-worms, and 

 occurs also in various other caterpillars and insects. 



UNCLASSED. 



Chionyphe Carter!. Mycelium, penetrating the 

 skin and subcutaneous tissue, sets up suppuration and 

 ulceration. Described as the cause of a disease known in 

 India as " madura-foot." 



APPENDIX B. 



EXAMINATION OF AIR. 



THE air, as is well known, contains in suspension mineral, 

 animal, and vegetable substances. The mineral world is 

 represented by such substances as silica, silicate of alu- 

 minium, carbonate and phosphate of calcium, which may 

 be raised from the soil by the wind, and particles of 

 carbon, etc., which gain access from accidental sources. 

 Belonging to the animal kingdom we find the debris of 

 perished creatures as well as sometimes living animals. 

 The vegetable world supplies micrococci, bacilli, and other 

 forms of the great family of bacteria, spores of other 

 fungi, pollen seeds, parts of flowers, and so forth. The 

 air of hospitals and sick rooms has been found to be 

 especially rich in vegetable forms, e.g.* fungi and spores 

 have been observed as present in particularly large numbers 

 in cholera wards, spores of Tricophyton have been dis- 

 covered in the air of hospitals for diseases of the skin, and 

 achorion in wards with cases of favus. The tubercle-bacil- 



