SCIENTIFIC COMMITTEE, OCTOBER 24. 



cxxv 



which had become completely rotten in the middle at the base of 

 the stem. Two-thirds of a crop were said to have been lost. 

 They were also referred to Kew. 



Injured Timber, Photograph. — Prof. Farmer showed photo- 

 graphs of sections of an ancient Elm, lately cut down at Oxford. 

 They showed a separation, for three parts of a circle, deeply 

 seated within the stem. As the subsequent annual rings were 

 at first discontinuous over the middle point, but gradually closed 

 over it, the interpretation seemed to be that the tree had been 

 partially decorticated, the wound being subsequently completely 

 concealed. 



Proliferous Fern. — Mr. Veitch forwarded a plant of Adiantum 

 (which appeared among A. Capillus- Veneris, but had broader 

 pinnules) having minute fronds starting from the situation of 

 the sori, apparently being aposporous, and developing new fronds 

 in the place of sporangia. Mr. Veitch remarks that this is the 

 first time that he had seen this occurrence on an Adiantum. 



Diseased Pears. — With reference to the Pears sent to the last 

 meeting, Mr. Massee reports that " the fungus is Glceosporium 

 fructigerum, Berk. There is no possibility of arresting the 

 disease in the mature state of the fruit, but this can be done by 

 using the proper remedy during the development of the fruit." 

 The remedy suggested for the same fungus in Peaches was " two 

 or three sprayings of potassic sulphide (half an ounce to a 

 gallon of water)." 



Scientific Committee, November 14, 1893. 



Dr. M. T. Masters, F.R.S., in the Chair, and nine members 



present. 



Diseased Onions. — Mr. Massee reported as follows upon^the 

 samples brought to the last meeting : " The Onions are 

 attacked by a Botrytis, the same species as the one described by 

 Prof. Marshall H.Ward in " A Lily Disease" {Ann. of Dot., 

 vol. ii.). The bulbs cannot possibly be saved now, the fungus 

 having spent its active period on the leaves ; while the hyphee 

 are now passing into the bulb to form sclerotia. If the foliage 

 had been sprayed with a fungicide the mischief would have 

 been kept within bounds. The diseased Onions should be burnt, 

 and not thrown on to the manure-heap." 



