[D8856ADB], Letter from Richardson and Metzger to Alfred Ord Tate, August 14th, 1888


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[D8856ADB], Letter from Richardson and Metzger to Alfred Ord Tate, August 14th, 1888

Editor's Notes

"Yours of the 11th and enclosure of Mr. Kennelly to Mr. Edison received. ### We took the grestest care in the manufacture of the barometer, and compared its readings day by day with the signal service here. ### The readings were slightly higher, due to the position, which was some 70 or 80 feet lower than the signal service instrument. ### This shows the barometer was correct here. ### It must have been damaged in transportation although to reduce risks to a minimum, Mr. Richardson personally carried the instrument to Orange. ### We would be only too glad to make good the defect and if you will have it sent on will refill it; but there is no guarantee that the same results will not follow its second shipment to Orange. ### If Mr. Edison has a glass-blower in the Laboratory we would suggest the following as the surest way to repair the istrument. Empty the tube, open its top and seal on a small bore glass ube by which it can be connected to a sprugel pump. ### Put the instrument together except top of brass tube which is left off that the glass extension may project, pour mercury into the reservoir through the air hole and start the pump, keep the reservoir full as the mercury is drawn into the tube. ### When the exhaustion is complete seal the tube at top and screw on brass cap. ### We feel sure this will be much safer than risking a second trip after it is filled." Yours respectfully Richardson & Metzger [page 3 includes a diagram of barometer set up, marking connection with the Spreugel Pump]





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Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
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