RFD 1 Rox 472 Culpeper Va. 22701
Tear Mr. Lederherg, Bune 7. 1670
n@ your piece in tne Post June 6, ahnout p ospnorous ete.

1l.. Muen sf the excess phos;hate in waste discharge, 1 belgeve to
be due to too much added to wash water. laybe the kitchen supply
should be in a diluted spriukle-bottle. a friend of mine who was
Stutioued in heidelberg years ago, before uou-foamiuzg deterzents
we-@ used, told me the Necxer river almost ran foam over the banks.

&. «. Share ,our intérest iu returniiug all intestinal waste - human
and auimél - to tne land. i nave lived in séveral places inStitzerland
where we had no waterboru sewage, hut Simple tight tanks of ample

Size, periodically pumped out to wooden taixs on carts and spread

on fields. The siurr; was sometimes used to Spread ou dormant
vegetable zardens and hoed in - perheps driec leaves or other

vegeteble matter dug in and left for hacterial dizestion/ ery little
artificial fertilizer was used.

*,. City sewaze ean he pumped aud treatedss done in Milwauxee. Why
uOt experiment further; presumably your suggested tertiary treatment
would take the more or less clear efflue::t after secondary sludge
separation, and either hy trickle of pumping in air in fine hubhles,
yring it to a gooé BOD state fit to Cischarge to stream or use for
irri-ation or dump in a dseo snad filter hed.

4, I suppose you know the case for using plein finely zround rock
phosphete rather thantr ating it vith Sulphuric acid. Myself, I
Simply add a pail of roek phosphate to cach spreaderload of manure,
I do use lime and potash. -y corn le:ves never show Signs of
phosphorns shortage,

I should he glad to see you follow up thé suhjcet in your
column. vart of our troubles of inflation aré due to our ignorant

and careless use of natural résourczeés.
K? dolek,

Her. Losely

Sincerely