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    "localId": "75724618",
    "label": "Letters Sent to Dr. Herman Schlundt, December 6, 1929",
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    "contentType": "document",
    "title": "Letters Sent to Dr. Herman Schlundt, December 6, 1929",
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        "Safety Light Collection",
        "Records Related to Radium Dial Painters"
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    "seq": 2,
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    "type": "document",
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    "ocrText": "December 6th,1929.\nDr. Herman Schlundt,\nMissouri University,\nColumbia, Mo.\nDear Dr. Schlundt:\nItems Nos. 1 to 5 inclusive on Leeds &\nNorthrup's quotation G-8757, dated November 25th,1929, are\nnecessary for assembling the type of equipment which we\nhave for measuring the luminosity of radio-active zinc\nsulphide.\nIn addition to this equipment you need a\nspecial reference standard, which is quoted under item #6.\nWe have had these reference standards made in Newark by an\nEngineering concern, and the cost has been around $25.00,\nwith a slight additional charge for wrenches for us in\nfixing the position of the standard lamp.\nThe reference standards which we have had\nprepared have proven very satisfactory, although I presume\nthey are not quite as nicely finished a job as Leeds &\nNorthrup would prepare. In case you would care to have us\nobtain these reference standards, I would be glad to attend\nto the matter for you. In this connection I would suggest\nthat you have two reference standards, otherwise you would\nnever know whether it was the reference standard which was\noff or the photometer proper.\nI do not recall what the cost involved is\nfor calibration of this apparatus, but it does not amount\nto a great deal. When you place the order for the equip-\nment you should instruct them to ship same to the Electrical\nTesting Laboratories, East End Ave. and 80th St., N.Y.C. for\ncalibration. At the time Leeds & Northrup advise you that\nshipment has been made you should take up with the Testing\nLaboratories the matter of calibration, and refer them to us\nfor instructions as to exactly what you wish to have done.\nIt would be best to count on a months time.\nfor the matter of calibration at the Testing Laboratories,\nfor as a rule they are very buzy and there is usually some\ndelay involved in getting to this type of work, inasmuch as\nit is special in nature.\nSincerely yours,\nVice President.\nHHBarker:RH"
}