108 MASSACHUSETTS HORTICULTURAL SOCIETY. 



ing the trees soon after the blossoms fall will kill a certain propor- 

 tion of them. The entire subject has been treated at some length 

 in the Annual Report of this Department for 1888, which is now 

 going through the press, and a copy will be sent you when it is 

 published. 



Yours truly, 



C. V. Riley, Entomologist. 



The subject for the next Saturday was announced to be " Cer- 

 tain Phases of Domestic Economy — Dust and Dampness," by 

 Mrs. Ellen H. Richards, Instructor in Sanitary Chemistry at the- 

 Massachusetts Institute of Technology. 



BUSINESS MEETING. 



Saturday, March 9, 1889. 



An adjourned meeting of the Society was holden at half-past 

 eleven o'clock, the President, Henry P. Walcott, in the Chair. 

 No business being brought before the meeting, it 

 Adjourned to Saturday, March 16, 1889, at half-past eleven 

 o'clock. 



MEETING FOR DISCUSSION. 



Certain Phases op Domestic Economy — Dust and Dampness. 



By Mrs. Ellen H. Richards, Instructor in Sanitary Chemistry, Massachusetts 

 Institute of Technology. 



Mrs. Richards began by mentioning some of the different kinds 

 of dust. Arctic explorers have found cosmic dust everywhere 

 that they have gone, and the study of the phenomena following 

 the eruption of Krakatoa fully proves that the dust from that 

 volcano was disseminated world wide. It is now pretty well 

 settled that fogs are composed of moisture collected around 

 minute particles of dust in the air. Then there is the dust blow- 

 ing about the streets today, filling our eyes and irritating our 

 lungs, — a dust which corresponds to the dictionary definition. 



