REPORT' OF NEW JERSEY STATE MUSEUM. 
• I 
one central pyramid, which was capped by a polished cube 
of dark green serpentine, quarried near Phillipsburg, and used 
for interior decoration. 
The center of the exhibit space was occupied by a restoration 
of Hadrosaurus Foulkii (Leidy). This was a reptile of the order 
of Dinosaurs which lived during the Cretaceous, their fossil¬ 
izes bones having been found at a number of localities in South 
Jersey, the best preserved individual being discovered near 
Haddonfield, about fifty years ago. “ It was a herbivorous 
animal of heavy proportions and very long hind limbs; the 
fore limbs measuring less than half the length of the latter. 
****** its great tail, hind limbs and pelvic bones 
were an efficient support, while it reached upward to the limbs 
of trees on whose foliage it fed. The fore limbs were chiefly 
used in drawing its food to it, though it probably rested on 
them as it stooped to the ground to devour vegetable matter 
there.” (Cope. Geology of New Jersey, 1868, p. 736). 
Through the kindness of the Philadelphia Academy of 
Sciences, the Survey was permitted to reproduce in plaster 
the Haddonfield specimen. This was supplemented by ma¬ 
terial obtained from the American Museum of Natural History, 
New York, the National Museum in Washington, and the Yale 
Museum at New Haven. In this way the errors which had 
crept into some of the previous restorations through insuffi¬ 
cient data, were avoided, and the result was scientifically 
accurate, as well as of popular interest. Other types of ex¬ 
tinct reptiles and mammals which lived in New Jersey and 
whose remains have been found in the State were represented 
by small models or drawings. A gold medal was awarded the 
Survey for the exhibit of rocks, minerals, ores and fossils. 
Since New Jersey is the chief clay-producing state in the 
country and stands third in the importance of manufactured 
clay products, it was fitting that a special exhibit of clays 
should be made. Sixty clays were taken, representing all 
grades of ball clay, fire clay, terra-cotta clay, hollow-brick 
clay, and clay for front and common brick. Bricklets of 
these were burned at various temperatures, so that by a com¬ 
parison of the raw clay with the burned bricklets, the amount 
of fire shrinkage, the color and behavior in burning of each 
cay could be determined. Additional facts regarding the 
