103.  How may timber be preserved from decay?

104.  What do you understand by limit of elasticity as applied to a beam under strain or pressure?  What is meant by the neutral axis of a beam?

105.  What is the tensile strength of a good quality of wrought iron per square inch?

106.  For what parts of a structure may cast and wrought iron be used in reference to tension and compression?

107.  Make a sketch of the form of cast-iron beam best adapted to resist a transverse strain.

* * * * *

CELEBRATION OF THE FIVE HUNDREDTH ANNIVERSARY OF THE UNIVERSITY OF HEIDELBERG, AUGUST, 1886.

The wave of pleasure and enjoyment which flooded everything has passed.  Heidelberg, usually so quiet, assumed the role of a city of the world, and all was bustle and excitement in the streets, which were hung with flags and other decorations.  The trains constantly brought new accessions to the crowd, and gayety and mirth reigned supreme.

The dedication of the renovated Aula of the University served as a prelude to the festivities of the week.  On this occasion a splendid flag, embroidered by order of the wives of the faculty of the Academy, an equally costly cover for the scepter, and a silver inkstand were added to the treasures of the University.  Conspicuous among the numerous presents received were a richly carved set of furniture—­the gift of former students from Switzerland—­and all the publications of certain book dealers.

On the afternoon of August 2, the Grand Duke and Duchess arrived in Heidelberg, where they were received with much enthusiasm.  They remained at the modest palace during the time of the jubilee, and whenever they appeared they were greeted with expressions of patriotism and love.  On the evening of the 2d, the Oberburgermeister, Dr. Wilckens, extended a hearty welcome to the guests who had gathered in the over crowded hall.  Vincenz Lachner conducted the musical part of the entertainment, which was charming.  The German Crown Prince arrived early on the 3d, so as to accompany his royal cousins to the service in the beautifully decorated Heiliggeistkirche, on which occasion Prof.  Bassermann spoke with great effect.  At 11 o’clock, the Court appeared in the Aula, where the Grand Duke presided, in virtue of his office of “Rector Magnificentissimus.”  His address was followed by those of the Crown Prince; the Prorector Geheimrath, Dr. Bekker; Edward Zeller, of Berlin; Jules Zeller, of Paris; and others.  In the evening the citizens and strangers were attracted to the Jettenbuehel by the festival at the castle; from 7:30 until 10 o’clock the nobility held court in the Bandhause.  The scene was like fairyland, all the outlines of the castle were marked by thousands of small lights, and the court was lighted by great candelabra.  In the ever-increasing crowd it was difficult to find a place and to obtain refreshments, which were given out in immense quantities by the State.