The study of many aspects of natural history, both indoors and in the field, can often be aided by the use of a magnifying lens, also called a hand lens, or loupe. There are cheap loupes and there are expensive loupes. There are really poor loupes and there are excellent loupes. What there isn't, is a really good cheap loupe. But it is possible to buy one that isn't too scarily expensive.
Map measure of the month: Wuilleumier Frères four-scale curvimètre
Pathways 3: Reading, Writing, and Critical Thinking: Vargo, Mari, Blass, Laurie: 9781133317104: : Books
Compass Basics: An Introduction to Orientation and Navigation : Articles : SummitPost
Guide To Choosing (and Reading) A Compass - GEAROGRAPHY
Trail Talk: Choosing A Loupe – Three Points Of The, 42% OFF
Trail Talk: Choosing A Loupe – Three Points Of The, 47% OFF
Map measure of the month: the Vistascreen Pathfinder – Three Points of the Compass
Teach Like a Champion Field Guide 3.0: A Practical Resource to Make the 63 Techniques Your Own [Book]
3 Basic Compass Skills Everyone Should Learn