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health and safety laboratory - Digital Collections

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I_ to Justify a monthly summary* In the data tables.; we have arbitrarily, taken<br />

"* the repdrtijig Of less than 10 -days i& the m0>nth to.be .an insufficient sample*<br />

-As it is desirable ;to obtain am estimate of cumulative values f or<br />

with soil data <strong>and</strong> to approximate the total deposition where other data ;are<br />

j| lacking >: missing xi^mths have been filled in by geographic interpolation* In<br />

the arbitrary system selected^ the. three closest stations are averaged for<br />

* geographic interpolation with some weight being giveaa to the months JTnmediately<br />

before -<strong>and</strong> after the missing month* .These interpolated estimates are marked<br />

as . such in the supnaary tables for each station*<br />

I - Cffinparfts&n: of Duplicate Stations<br />

Since duplicate films were ^exposed daily at most of the network<br />

^ stations^ there is a ccmsiderable body, af data, on paired saisples at the<br />

same location* A statistical treatment of the duplicates is planned as an<br />

exercise in mathematical statistics^ but this project will not be coiigslete<br />

A f

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