Mr. Hatton. Except our own office copy.
Mr. Mignault. And the process is described?
Mr. Hatton. Quite well; and the results.
Mr. Magrath. I suppose it is impossible to get copies of this any place?
Mr. Hatton. Well, there are some of them in public laboratories throughout the country and among engineers; but we had a pretty lively demand for them and we only had 500 copies issued, and they are all gone. That is a copy I picked up on my desk yesterday.
Mr. Rich. Mr. Chairman, I have a brief statement here regarding lake currents which would elucidate what Mr. Hatton was not quite familiar with.
Mr. Goddard, assistant engineer at Grand Rapids of the United States engineer office, read a paper before the Engineers’ Club, of Grand Rapids in April, 1916, which included his own experience, as well as a compilation of the results of the studies of others and covering a number of years. His conclusions were that the currents in the Lakes are produced primarily by the winds and secondarily by variation in barometric pressure.
Wind currents follow the direction of the wind.
Pressure currents flow from high to low pressure areas.
The flow through the Straits of Mackinac in either way, according as the above conditions prevail.