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TCS Updated 24 February 2006
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A Rare Texas Moth?

Allen E. Rhodes

This moth was photographed on the ranch where I hunt in LaSalle County, Texas, approximately 5 kilometers (3 miles) east of Los Angeles on Highway 97.

Forrest Mims' World of Science
by Forrest M. Mims III

Editorial: LABRats and the Education Crisis by Forrest M. Mims III

Eye on the Sky: The March Sky by Paul CurtinI

Wanderings with Ralph Coppola

Mathematics Corner: Math Project #2: How does the consistency requirement of the number system lead to the real numbers?
George E Hrabovsky

Backscatter. Views and responses from TCS readers.

Mind of a Theorist: A New Year For The Mind of a Theorist by George E Hrabovsky

Eye on the Sky: The February Sky by Paul Curtin

Mathematics Corner: Introduction to the Fourth Year of this Column
George E Hrabovsky

Liftoff! LABRats Takes Flight

2006 Citizen Science Conference Announced

"The Funniest Graph" Contest

A Practical Prime Number Producing Formula Presented in Algorithmic Form

Robert A. Warren 

The prime number formula presented here is the best of my simple formulas. This formula uses small primes to produce larger, guaranteed-to-be-prime numbers (positive integers only) of less than about 1,000.

The Sperling Files: FFNs, LBBs, and LBMs

Norman Sperling

When novices start to use their first telescope, they look at the sky's major showpieces, such as the Messier nebulæ, clusters and galaxies. They're big and bright enough to show up in binoculars, and a beginner's telescope shows detail in many of them.

Sunlight Artifacts and How to Observe and Photograph Them

Many years ago in southeastern Wisconsin on a crisp, clear autumn day, I was for some reason no longer remembered scanning the sky near the Sun with my binoculars. Suddenly a brilliant white speck crossed the field of my binoculars followed by several more.

In 1992 and 1994 two discoveries were made that have had a major impact on the scientific community. These finds, the Schaefer and Hebior mammoths, were discovered and excavated in Kenosha County, Wisconsin, through the efforts and skills of a number of individuals. More.

How to Prepare Abrasive Powders

Alvaro Amaro de Azevedo

Arrange about 200 g of washed dried sand and put it in a ball mill (see here or search here). Let it crush for one hour or so and then transfer the flour to a 200 ml glass.

Response to "Questions and Answers about Climate Change" by Forrest M. Mims III

Kevin T. Kilty

"What is going on here?" asks Forrest Mims (Editorial, TCS, 11 March 2005). Why do countless web sites all appear to present unbalanced views of climate change?". More.

Algorithms for Mental Conversion between the Fahrenheit and Celsius Scales

Robert A. Warren

Yes, quick mental conversions can be made between the Fahrenheit and Celsius scales, using the algorithms presented in this paper. But before these algorithms are presented, some background material is needed. More.
   
Copyright 2005 by Society for Amateur Scientists