Our indexes include entries for the spelling mertens. In the period you have requested, we have the following 50 records (displaying 41 to 50): 

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Naturalizations (1925) The Home Office issued monthly lists of aliens to whom Certificates of Naturalization had been granted by the Secretary of State and whose oaths of allegiance had been registered in the Home Office. These notices, from January to December 1925, refer to naturalizations from December 1924 to November 1925. The lists give full name (surname first) with any aliases; country of origin; occupation; full postal address; date of taking the oath. A dagger indicates re-admission to British nationality.	Sample scan, click to enlarge
Anglican clergy (1930) Crockford's Clerical Directory listed all Anglican clergy in the British Isles, India, the colonies, Europe, Asia and South America. The 59th annual issue, for 1930, is based on returns from all the individuals listed. The details given are: name (surname first, in capitals) in bold, prefixed by an asterisk in the case of university electors, and by a dagger whether the return had not been made, or it had been imperfectly filled up; name of theological college and/or university, and degrees, with years; a bold d followed by year and diocese signifies date of ordination as deacon and by which bishop; then a bold p, similarly for ordination as priest; posts (C: curate; I: incumbent; V; vicar; R: rector) with parishes and years; address; telephone number; and lists of books &c. where appropriate. In the case of the man then holding an English, Irish, Scottish or Welsh benefice, additional details are given - a bold P signifies the patron of the advowson; then the income, with items such as Q. A. B. (Queen Anne's Bounty), Eccles(iastical) Comm(issioners), Fees, e. o. (Easter Offerings), Pew Rents, T(ithe) R(ent) C(harge), Gl(ebe), &c.	Sample scan, click to enlarge
Appointments of Clerical Class Staff (1936) The Civil Service Commission issued monthly lists of newly appointed, promoted and assigned employees, giving the date, name of department, full name of employee, and (for new appointments) whether appointed with or without competition or under a particular clause of the General Regulations. January 1936	Sample scan, click to enlarge
Appointments of Ministry of Transport Staff (1936) The Civil Service Commission issued monthly lists of newly appointed, promoted and assigned employees, giving the date, name of department, full name of employee, and (for new appointments) whether appointed with or without competition or under a particular clause of the General Regulations. January 1936	Sample scan, click to enlarge
Royal Air Force appointments and decorations (1937) Orders from the Air Ministry conferring promotions, decorations and alterations of rank during September 1937.	Sample scan, click to enlarge
Chartered Electrical Engineers (M. I. E. E.) (1939) The Institution of Electrical Engineers was founded in 1871 under the name of The Society of Telegraph Engineers, and incorporated by royal charter in 1921. The list of members, corrected to 1 September 1939, gives the names and addresses of the various grades of members. Members (M. I. E. E.) and Associate Members (A. M. I. E. E.) were entitled to describe themselves as Chartered Electrical Engineers. Then there are the Associates (Associate I. E. E.), Companions (Companion I. E. E.), Graduates (Graduate I. E. E.) and Students (Student I. E. E.). The names are given in bold, surname first; before each name is the year of attaining that grade; and for the higher grades the year of each lower grade is also given, e. g. (G. 1931).	Sample scan, click to enlarge
London Telephone Subscribers (1939) The London telephone directory lists subscribers alphabetically by surname and then by christian name or initials, with their postal address and telephone number. This is the L to Z directory issued in May 1939, but also contains some names from earlier in the alphabet, for instance in the separate section for midwives. The London telephone districts comprised not only the city centre, but also the very extensive suburbs in the Home Counties (Essex, Kent, Surrey and Middlesex).	Sample scan, click to enlarge
Members of the Institution of Mechanical Engineers (M. I. Mech. E.) (1947) The Institution of Mechanical Engineers, founded in 1847, was incorporated by royal charter in 1930. The list of members of 1 March 1947 gives the names (surname first) and addresses of the seven classes of member - Honorary Members (Hon. M. I. Mech. E.); Members (M. I. Mech. E.); Associate Members (A. M. I. Mech. E.); Companions (C. I. Mech. E.); Associates (A. I. Mech. E.); Graduates (G. I. Mech. E.); and Students (S. I. Mech. E.). The year of attaining qualification is given in the left-hand margin; in the higher grades the years of achieving the lower grades are also given, bracketed together. The crossed swords symbol indicates naval or military service during the Great War of 1914-1918; an italic b shows a member of the Benevolent Fund. (p) after a Graduate's or a Student's name indicates one who had passed the whole of the A. M. Examination or its recognized equivalent.	Sample scan, click to enlarge
Chemists (1950) The Royal Institute of Chemistry was founded in 1877, and was open only to British subjects (and also, in due course, to citizens of the newly-created Republic of Ireland). Associates of the institute (A. R. I. C.) qualified either by studying chemistry, physics, mathematics and an optional science for the institute's examination (which insisted on a high standard of practical laboratory efficiency); or by obtaining good honours degrees or equivalent qualifications, with chemistry as principal subject, and having undergone training in allied sciences. Associates of at least three years' standing could then be admitted to the Fellowship (F. R. I. C.) either by taking a further examination in a special branch of chemistry, or by submitting the results of work or evidence of experience sufficient to justify the Council in granting exemption from such further examination. This register of fellows and associates, correct to 31 August 1950, contains 11,545 names, arranged alphabetically, surname first (in capitals), with qualifications, current address, telephone number, and (in italics) a brief description of present post in the chemical industry. Finally, year of admission as associate (A.) (and, where appropriate, fellow (F.) is given on the right-hand side. With this may appear the notation (x) for a fellow of the Chemical Society, (y) for a member of the Society of Chemical Industry, or (z) for a joint subscriber to all three chartered bodies.	Sample scan, click to enlarge
Estates of the Deceased: Notices under the Trustee Act (1950) Under the Trustee Act 1925 s. 27, notices were gazetted giving the names of deceased (surname first, in capitals); address, description, and date of death; names, addresses and occupations of persons to whom notices of claims against the estate were to be given, and names (in brackets) of personal representatives; and the date on or before which notices of claim were to be given. April 1950.	Sample scan, click to enlarge

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