Optical illusion

Most optical illusions take advantage of how the brain encodes visual information presented to it from the eyes. This one looks like Einstein up close and like Marilyn Monroe at a distance or even from an angle. It all depends on focus.

This image came from a forwarded email; source is unknown.

A Trip to the Science Museum

Last week we took a trip to the Boston Museum of Science. I've been going to the MOS since I was a child, and I remember many of the things there. For example, the museum is part in Cambridge, part in Boston and you can straddle the town line; and the musical staircase that plays a note when you step on a stair:

Another long-time exhibit that still fascinates is the perpetual motion sculpture:

Seeds to seedlings

Who can ever forget the look on a child's face when he plants seeds and sees them sprout? This is a timeless classic. Ds#3 was given a small seed-starter kit with pots, soil disks, a greenhouse, and some wonderful culinary herbs (oregano, parsley, and basil.)

We planted the seeds last weekend...

and now we have sprouts.

I can't wait until the harvest! I happened to pick up a vintage copy of Seeds and More Seeds by Millicent Selsam at a book sale Friday; I couldn't help but think of ds#3.

Old Science Books

I love old books—the cloth covers, the paper, the print, the illustrations. I have many of them, even old science books. Old books can be tricky territory when it comes to science. Old medical books, for example, could not be used to learn medicine today except perhaps anatomy. Nor would you have much luck regarding technology. Discoveries advance our knowledge, rendering theories obsolete. Yet a lot of basic science, especially physical science, is timeless, at least since the time it was first discovered or described.

Just about any book written in or before 1923 is in the public domain (and, by the way, works created by the federal government are in the public domain, too.) There are many reasons to consider using these treasures. They were written at a time when God and Christian values were more honored in the general culture; they reflect these values, even include reference to God in their content. If they have endured they are likely good reading, maybe because of writing style or historically important information; some are truly classics. At the very least, they are free to download or inexpensive to buy (usually.)

Project Gutenberg is the first and now most extensive source of electronic books (ebooks.) Many other sites get their ebooks from it. You can search by author, title, or subject, which is good if you know what you are looking for, but you can't really browse. For example, Eva March Tappan's book, Diggers in the Earth, which I found through another web site, is listed under subject:reader, which I never would have guessed. While they have greatly shortened the very annoying legalese at the beginning of their books, this is not so of many of the ebooks they first published. That can all be easily deleted unless you are downloading the ebook for your PDA.

Manybooks takes books from Project Gutenberg and converts them into a wide variety of formats for PDAs and Smartphones, even for the new Amazon Kidle. Not only can you search by author and title, you can also browse by category. (I only wish I could limit the choices by selecting books that have two or more categories.) When you view a title, it will also provide a link to Librivox if the title is available in audio.

The Baldwin Online Children's Literature Project is another great site that is independent of Project Gutenberg, so it has many titles not available elsewhere on the web. The books are nicely categorized to make browsing easy. Unfortunately you cannot easily download any of the titles since the site is linked to Yesterday's Classics, a separate site where you can purchase paperback reprints of many of the titles.

Google has been scanning the book holdings of many academic institutions and making these ebooks available at Google Books. The site is so enormous that you really cannot browse it; you need to know what author or title you're looking for. Most of the books that are out of copyright, and some that are still in copyright, can be viewed and downloaded in pdf format. You can even do a full text search of books for which text is available to download.

The Internet Archive text section also has a vast number of books not found at either Google or Project Gutenberg. Their Americana collection contains almost 200,000 books from libraries around the country scanned by Microsoft, Yahoo, and the Sloan Foundation. The search feature is very good at narrowing subjects, though you can only truly browse by author or title. Thanks, Christi, for prompting me to take another look at the site!

Buying old books can be a bit tricky when one person's "good" condition may be another's "poor." In general, though, I have had very good experiences with it. I have been satisfied with the vast majority of books I have bought, I've even been impressed by some. On rare occasion have I not been happy with what I had purchased, and only once have I not been satisfied with how the seller wanted to resolve the dispute. I buy the vast majority of my used books from 4 places.

1. Library book sales. Most children's titles are $0.25 to $1.00 depending on the sale. I use Book Sale Finder to find out when they are happening in my area.



2. Abebooks. No book is less than $1 but shipping varies by seller, and many have discounted shipping for multiple books. I have used the aggregate used book engines like AddALL and Bookfinder, but abebooks usually has the best price.
   


3. Amazon. Many books sell for less than $1 but shipping is never less than $3.99 nor will you get a shipping discount for multiple books.
   


4. Used book stores. I have one I really like about 30 minutes from my house. Nothing is catalogued; he does not do Internet sales. It is a real adventure in serendipity!
   

In lurking around these sources, I have found some interesting children's science titles you may want to look at yourself. Keep in mind I have not read most of these—yet!

The Baldwin Project has three Ambleside Online titles: Madam How and Lady Why by Charles Kingsley, The Fairly Land of Science by Arabella Buckley, and Great Inventors and Their Inventions by Frank P. Bachman. They also have works by Jean Henri Fabre and Charles Gibson; search by genre and scroll down to "Science" to see the titles.

I prefer to browse Manybooks.net to get an idea of what is available at Project Gutenberg. A few gems include Country Walks of a Naturalist with His Children by W. Houghton, Diggers in the Earth by Eva Marie Tappan, Rollo's Experiments by Jacob Abbott, and a whole series of invention and industry titles like The Story of Glass, Carl and the Cotton Gin, and several others by Sara Ware Bassett. You can subscribe to RSS feeds for new titles in each category at Manybooks.

Please add comments if you have any treasured places to find old books, and any title recommendations you have.

Chance or Purpose: Creation, Evolution, and a Rational Faith

C-SPAN BookTV aired Christoph Cardinal Schonborn (Archbishop of Vienna, advisor to Pope Benedict VI, and primary editor of the Catechism of the Catholic Church) discussing his book, Chance or Purpose: Creation, Evolution, and a Rational Faith. In addition, Robert Russell (ordained minister of the United Chruch of Christ) and Alejandro Garcia-Rivera (Jesuit School of Theology) of the Graduate Theological Union speak on the topic. Hopefully BookTV will keep access to this program from this web site. You'll need Real Player to stream it.