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Summerfield Books specialises in the supply of books on botany, forestry and related natural history.
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Browse our Botanical BooksNew Botanical and Scientific BooksForthcoming Botanical BooksSecond-Hand Botanical BooksSpecial Offers on Botanical Books
Arboriculture and TreesBotanical ArtBritish Botany - GeneralBritish Botany - Local FlorasBSBI PublicationsDarwiniaEcology, Habitat Management and Landscape HistoryEuropean FloraFaunaFerns, Mosses, Algae and LichensField Studies CouncilFungiGeneral BiologyGrasses, Sedges and PalmsHorticulture and GardeningMagnifiersMarine LifeNatural HistoryOrchidsPlant MonographsPlant SciencePlantlife PublicationsPlants and PeopleRest of World FloraUncategorisedzzz
Welcome to Summerfield Books - suppliers of new, rare & out-of-print books on botany, forestry & natural history

Established in 1985, Summerfield Books is a family business specialising in the supply of books on botany, forestry and related natural history.

We are the Official Stockist and Distributor for ALL Botanical Society of the British Isles (BSBI) Publications.

Most books featured on this website are normally available for immediate dispatch.

For help and advice in finding a book please call us on 01768 210 793
New Entomology Titles Orchid Books Ferns, Mosses, Algae and Lichens Brecon Beacons by  by Jonathan Mullard Over 300 books on Lichens The Flora of Worcestershire
Featured Titles from Summerfield Books
Here is a selection of some recently published titles that we stock.
Featured Second-Hand Botany and Natural Science Books from Summerfield Books
Here is a selection of second hand books from our stock. Please make enquiries if you do not find what you are looking as only a selection is currently uploaded. If it is not in stock then will we endeavour to find a copy for you.
Hand Lenses
To view all hand lenses, and other magnifiers click on the Magnifiers category on the LHS of this page.

Some General Notes On Hand Lenses - Use the scroll bar on the right to scroll down for more details

The hand lenses we supply are chosen primarily for biological work, although they are also suitable for geologists and other users.

Choosing a Lens

Lower magnification lenses give a greater depth of field than high magnification lenses and have some advantages in the field, if focusing is an issue!

Wider diameter lenses are better in lower light levels than smaller diameter lenses, although the optically usable part of in all but the best wide diameter lenses is a smaller area near the centre. Hence, single glass lenses and plastic lenses with a wide field of view, which are generally inexpensive, perform quite adequately at lower magnifications.
However, unless carefully ground to correct for optical aberrations, which effectively reduces the useable area, single lenses perform less well at a higher magnification.

To correct for optical aberrations, better quality lenses are constructed as doublets, others as triplets. These lenses can be either cemented together or the air gap between used as part of the compensatory mechanism.
By combining different glass types, with different concave/convex characteristics, to give improved chromatic (colour) correction, so called achromatic lenses, focus different wavelengths of light, typically red and blue, in a similar focal plane to give a sharper image.
Lenses that are described as aplanatic, correct for the fact that simple spherical lenses focus light at different points on the central axis. resulting in distortion at the margins of lens and blurring.

Lenses are sometimes housed in a a black mount to reduce peripheral glare.

Generally a x10 magnification lens will be found sufficient for most botanical field work, but a x 20 magnification lens will be useful for studying lichens and bryophytes as well as more detailed inspection of plant parts. Double ended lenses are an option.

At greater magnifications then x20, it becomes expensive to produce lenses that have anything but a fairly restricted field of view. Most quality lenses at this level of resolving power are usually relatively expensive and for practical purposes many people find a simple microscope more appropriate. Inexpensive models that can be used in the field are available, although focusing with hand held devices may be an issue! We do not currently stock any such items but can obtain them. Please enquire.

By incorporating a battery powered light in the housing, some lenses enable the object being viewed to be illuminated,. This can be invaluable in poorly lit areas, such as woodland or when examing fissured backgrounds such as tree bark. Depending on the model, illumination might be in the visible light range only, or, include the near UV, the latter being useful for illuminating some lichens as well as fluorescing crystals

Scale loupes are essentially a handy measuring device. They incorporate a graduated scale (graticule) within the mechanism which can be focused, and are useful in the field as well as on the benchtop.

FOCUS ON ... ARBORICULTURE

Arboriculture is concerned with all aspects of the growing, production and maintenance of trees in the landscape, for their amenity or ornamental as opposed to their utility value: i.e. for people's enjoyment and use rather than for the value of the timber.
We stock a wide range of books encompassing everything from the general care and management of trees in both urban and rural environments, to more specific needs, such as legal issues and health and safety concerns especially in relation to tree disorders. Many of these books will be of particular interest to professional arborists and those working in other landscape professions, whilst others are of practical value to anyone with an interest in or concern for trees.
We stock all of Klaus Mattheck's books as well as other key handbooks widely used by arborists.
 
Spon's External Works and Landscape Price Book 2014
Ancient and other veteran trees: further guidance on management
Trees & Shrubs Hardy in the British Isles Volume1-4 + Supplement
Diagnosis Of Ill-Health In Trees 2nd Edition, 7th Impression 2013
Principles Of Tree Hazard Assessment And Management. 2013 Edition.
Stupsi erklart den Baum -
Tree Pests and Diseases: An Arborists' Field Guide [Spiral-Bound]
Guidance Note 1:Protected Species and Arboriculture
Bats in the context of tree work operations
The Town and Country Planning (Tree Preservation) (England) Regulations 2012
Trees, people and the built environment
Urban Trees: A Practical Management Guide
Common sense risk management of trees
Ancient Trees in the Landscape: Norfolk's Arboreal Heritage
Thinking Tools after Nature
Landscape Trees and Shrubs
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