9o 



NEW YORK STATE MUSEUM 



Summary of experiments 



The results so far as killing the scale is concerned are markedly 

 similar in the case of all lime-sulfur washes employed excepting 

 numbers 7 and 8 where no heat of any kind was allowed to aid 

 in effecting a combination between the lime and sulfur. The 

 general behavior of the washes coupled with experience therewith 

 in previous years leads us to regard formula 1, calling for 20 

 pounds of lime and 15 pounds of sulfur to 50 gallons of water 

 boiled at least 30 minutes, as of at least equal value to any other 

 fire or steam boiled wash. Formula 2 calling for a little more 

 lime and sulfur was not enough better to warrant the increased 

 amount of material. Formula 6 consisting of 15 pounds each of 

 lime and sulfur to 50 gallons of water gave excellent results, yet 

 previous experience leads us to believe some excess of lime is pre- 

 ferable on several accounts. We therefore continue our recom- 

 mendation of formula 1 as being among the best of the lime-sulfur 

 washes. 



The so called unboiled washes depend upon chemical heat to 

 bring about a combination, and of these formula 3 composed of 20 

 pounds of lime, 15 of sulfur and 10 pounds of sal soda to 50 gallons 

 of water gave as good results as any similar combination, though 

 more of the soda may be used as called for by formula 4. The 

 lime-sulfur-sal soda wash requires a little care in preparation but 

 after some experience the general results are much more satis- 

 factory so far as chemical behavior and combination is concerned, 

 than is the case with other unboiled or chemically boiled washes 

 we have employed, and as stated above it holds its own in destroy- 

 ing the scale. It requires a minimum amount of hot water to 

 secure a very satisfactory prolonged chemical action. Experience 

 with this wash shows that it can be prepared without any hot 

 water but unless the lime be of very superior quality we believe 

 this to be inadvisable. Formula 5 requiring 30 pounds of lime 

 and 15 pounds of sulfur to 50 gallons of water depends upon the 

 heat generated by the large amount of lime to bring about a satis- 

 factory combination between the sulfur and the lime. The action 

 as noted is violent though of short duration and generally speaking 

 the combination is not nearly so satisfactory as that obtained where 

 sal soda is employed, and the wash itself is not so easy to handle. 



Experience with a very fine amorphous sulfur and carefully slaked 

 lime mixed together after the latter had cooled showed that this 

 combination was practically of no value and further discussion 



