What is your opinion about that?— a determination of sulphuric acid was asked for. It was requested as a matter of convenience that the results should be stated in their equivalent of sulphate of soda. It is immaterial really in what form the sulphuric acid is stated. In ordinary soil analyses it is usual to state sulphuric acid a such, and this has been my own practice. But for the investigation of salt problems it is convenient to state as sulphate of soda. This is the usual practice, and I produce a report received last week showing that this is so (copy of latest American bulletin produced). One knows that the sulphuric acid is not all combined with soda, just as with common salt in these analyses, one knows that the chlorine found is not all sodium chloride. It is merely the manner of stating how much sulphuric acid is found. If he cannot guarantee the figures I very much regret it will ne necessary to have those particular analyses made elsewhere.