The Symbolism of Freemasonry by Mackey, Albert Gallatin 
The complete text of a classic work on Masonic Symbolism. Presented as scanned images of individual pages through the "Making of America" archive.
http://moa.umdl.umich.edu/cgi/sgml/moa-idx?notisid=AHK6822Freemasonry: The Legacy of the Ancient Egyptians 
A discussion of Egyptian symbolism manifested in the design of The Port Adelaide Masonic Centre in South Australia, that is built in the form of an Ancient Egyptian Temple.
http://ancientegypt.hypermart.net/freemasonry/index.htm
Symbolism of the Lambskin Apron 
Masonic Essay discussing the apron worn as the "Badge of A Mason".
http://salem289.tripod.com/lamb.htm
The Seven Liberal Arts 
Based on the types of studies that were pursued in the Classical world, the Seven Liberal Arts became codified in late antiquity by such writers as Varro and Martianus Capella.
http://cosmopolis.com/villa/liberal-arts.html
Lucky Number Seven 
An essay discussing the symbolism of the number seven.
http://www.luckymojo.com/number7.html
Obelisks, and the New York Obelisk 
An article discussing the symbolism of oblisks, published in "Catholic World" magazine in March, 1881. Viewed through the "Making of America" archive.
http://moa.umdl.umich.edu/cgi/sgml/moa-idx?notisid=BAC8387-1435CATH-73
Our Ancient Friend and Brother, the Great Pythagoras 
An essay discussing the role of Pythagoras in the ancient Masonic and Hermetic mysteries.
http://www.geocities.com/Athens/2092/paper1.htm
Language of the Heart 
A Masonic essay by Carl H. Claudy.
http://www.edmond-mason.org/education/3-29%20Language%20of%20the%20Heart.html
The Opening of the Lodge 
A Masonic essay that follows an imaginary Candidate through the Craft Degrees, opening the Lodge in each degree, taking selected symbols and making inquiry as to their meaning and implications.
http://salem289.tripod.com/opening.htm
Hermetic Symbolism in a Masonic Engraving 
A description of a copperplate engraving found in the archives of a masonic lodge in Bamberg in Germany. The plate is rich in symbolism. Examines how hermetic ideas were woven into the complex symbolism of late 18th century Masonry in England.
http://www.levity.com/alchemy/bamberg.html
Mozart's Other Masonic Opera 
An essay by Roger Firestone offering a Masonic interpretation of The Abduction From the Seraglio.
http://www.edmond-mason.org/education/Mozart.html