104 TESTIMONY OF HENEY MORTON. 



the number 120 ; they would then indicate something denser than 

 normal milk and I think it is clear enough already what this would 

 mean that the normal milk stood 100, being an extremely 

 light kind of milk ; that milk would be often found for sale heavier 

 than this, and the degree in which it was heavier would be indicated 

 on this scale, but no longer as a percentage of milk and water of 

 course as before ; this I understand to be what the instrument is, 

 and I presume must be what the learned counsel alluded to. 



COUNSEL I move to strike the answer out ; it is not responsive 

 to the question. 



COURT I think it is responsive, or if you think it is too much 

 responsive, I will leave it in. 



COUNSEL I will except. 



WITNESS Would you like me to add a word ? 



COUNSEL No, sir. 



Q. Now, Prof. Morton, if milk which when pure would have 

 stood, by the lactometer, at 120, have 15 per cent, of water added to 

 it, what will the lactometer show ? A. I never tried that experiment. 



Q. Can you state from the vast knowledge which you have ac- 

 quired from other sources than by experiment? A. I think no man 

 of scientific knowledge will ever venture to predict the results of 

 an experiment. 



Q. Then, do you not think that it is only safe for a scientific man 

 to testify to things within his own personal experience ? A. When 

 he testifies to them as matters of his knowledge, certainly. 



Q. When he testifies to them as matters of fact in a court of law, 

 is it safe for him to testify to matters' outside of his own personal 

 experience ? 



(Objected to ; objection sustained ; exception.) 



Q. Suppose pure milk stands at 100 degrees on the lactometer 

 when properly tested, how, much water may be added without bring- 

 ing the lactometer down lower than 99 ? A. This would depend on 

 the accuracy of the lactometer, but, within the reasonable limits, I 

 should suppose one or two per cent. 



Q. How much would be required to be added to bring the lacto- 

 meter down two degrees ? A. Two or three per cent. 



Q. How much to bring it down ten degrees ? A. From ten to 

 twelve per cent. 



