N1NETEESTH ANNUAL MEETING. 177 



Question : Yes. 



Prof. Scott: If it is made according to the formula of 

 Professor Stewart of Pennsylvania, — according to his state- 

 ment, it will keep indefinitely. That is, to use half as much 

 lime as sulphur, and boil it for about fifty minutes. Put it 

 away in a tight vessel, and it will keep without precipitating 

 or crystalizing at all. Where the old formulas, with an ex- 

 cess of lime, are used, it will not keep ; it will crystalize. 



Mr. Knapp : If it is used immediately, is there any 

 necessity for using so much lime, or would it be better to 

 make it fifteen pounds of sulphur to ten pounds of lime, or 

 something like that? 



Prof. Scott : That is all right. I do not see any rea- 

 son for using the additional lime. 



Mr. Knapp : In making it that way, wouldn't you think 

 it would hasten the matter to use warm water to boil the 

 lime, and continue that process so far as possible? Isn't 

 there something to be gained in using hot water and starting 

 it along, and perhaps saving time? 



Prof. Scott : Yes, if you are making the self-boiled for 

 spraying in the dormant season, yes, but the self-boiled mix- 

 ture usually is not quite so successful for dormant spraying 

 because you do not get all your sulphur into a solution. 



Question : You said "self-boiled." I thought you 

 meant home-made. I do not understand you. I mean for 

 dormant trees. 



Prof. Scott : It should be boiled. 



Question : Well, isn't there an advantage to let the 

 lime into hot water, because you would gain by the boiling 

 as well as by the condition of the mixture? Isn't there a 

 saving to use hot water? 



Prof. Scott: As you state it now, yes sir. 



