Book of Constitutions Guarded By the Tiler's Sword
Let me introduce the speaker of the evening, although, as presiding officers so often say, he hardly needs an introduction. I believe that most Masons know him well and, after I describe him, you will easily recognize him. He is the Tiler of his Lodge and a very interesting man to meet. You will find it worth while cultivating his acquaintance.
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The 47th Problem of Euclid
The 47th Problem of Euclid, also called the 47th Proposition of Euclid as well as the Pythagorean Theorem is represented by 3 squares.
To the speculative Mason, the 47th Problem of Euclid may be somewhat mysterious. They may see this symbol on Masonic certificates or on Masonic cufflinks or quite often Freemasons proudly wear Masonic lapel pins with this symbol on them. Most Masonic books, simply describe it as "A general love of the Arts and Sciences". However, to leave its explanation at that would be to omit a subject which is very important... not only of Pythagoras's Theory, but of the Masonic Square.