[Report of the Medical Officer of Health for Surbiton] page 51

Surbiton 1962

[Report of the Medical Officer of Health for Surbiton]

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51.

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The following is a summary of the several treatments carried out since disinfestation of Sewers commenced in 1948:–

Date	Description	No. of manholes Pre-baited	Takes of Pre-bait	No. of Manholes Poison baited	Takes of Poison bait
April 1 948	1st Initial treatment	218	77	77	31
July 1948	2nd „ „	77	14	10	8
February 1949	1st Maintenance treatment	80	49	49	18
July 1949	2nd „ „	71	20	24	7
March 1950	3rd „ „	58	41	41	21
July 1950	4th „ „	41	20	22	13
February 1951	5 th „ „	57	17	17	15
August 1951	6th „ „	35	14	14	6
February 1952	7 th „ „	69	36	36	15
July 1952	8 th „ „	58	14	14	4
February 1953	9 th „ „	54	13	13	8
February 1954	10th „ „	47	16	16	8
August 1954	11th „ „	16	7	7	5
December 1955	12th „ „	21	18	18	14
December 1956	13th „ „	61	52	52	38
May 1957	14th „ „	49	15	13	8
May 1957	14th „ „	–	–	4+	2
November 1957	15th „ „	36	13	13	9
November 1957	15th „ „	–	–	18+	9
April/May 1 958	16th „ „	–	–	28+	3
December 1958	17th „ „	–	–	49+	26
July 1959	18th „ „	–	–	33+	1
November 1959	19th „ „	–	–	6+	4
June 1960	20th „ „	–	–	7+	1
November 1 960	21st „ „	–	–	47+	16
July 1961	22nd „ „	–	–	22+	2
November 1 961	23rd „ „	–	–	34+	11
June 1962	24th „ „	–	–	16+	4
December 1962	25th „ „	–	–	4+	3

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+ Direct poisoning with Warfarin.