p i

BACK NUMBERS OF THE ECOLOGIST ARE AVAILABLE FROM THE ECOLOGIST AT 40p EACH, with the exception of Vol. 1, 12 & 14, Vol 2, 5. These rare issues are only available in complete Volumes as follows: VOLUME 1 (18 issues) July 1970-December 1971 £6.00 ($18.00)

and index

VOLUME 2 (12 issues) January-December 1972 £4.00 ($12.00)

and index

VOLUME 3 (12 issues) January-December 1973 £4.00 ($12.00)

and index

BINDERS FOR THE ABOVE and for VOLUME 4 £150 each ($5.00) plus

10% p & p outside the UK

i 1 l 33

1 ft

Indices for Volumes 1, 2 & 3 50p ($1.00) each or £1.00 for the set

Order from Subscription Dept. The Ecologist, 73 Molesworth Street, Wadebridge, Cornwall PL27 7DS SUBSCRIPTION ORDER FORM ON PAGE 309 wmmmmmmmmmmmmmmmmmmimmmmmmmm

WADEBRIDGE ECOLOGICAL CENTRE announces the publication of a series of pioneering studies for the post-industrial age. The first three are:

The Epistemological and Behavioural Basis of Culturalism: A General Systems Approach, by Edward Goldsmith. Price: 80p

Methane, by Steve Sampson. Editor Andrew MacKiilop Over 30 different designs suitable for D-I-Y installations, farms, communities, and horticulture. Biological and biochemical background. Price: £1.60

Hydro-power, by Andrew MacKiilop Historical and modern waterpower. Sections on turbines and wheels showing how to construct a small wheel and Pelton turbine. Sections by turbine builders. How to measure power available. Legal aspects. Off-the-shelf and built-up equipment. Price: £1.60

SPECIAL DISCOUNTS 10% for 10 copies 20% for 20 copies

More titles to follow Wadebridge Ecological Centre, 73 Molesworth Street, Wadebridge, Cornwall PL27 7DS