1098 Wlarvels of the Universe 
; The wonderful crystalline structure of nugget- 
gold is not very apparent from an inspection 
of its knobby surface ; but on cutting it through 
and polishing the precious metal, the mode 
of arrangement or orientation of the crystals 
is well developed by a slight etching with 
aqua-regia. The photograph reproduced in 
the illustration shows a section of a small 
Photo by} LP. Primrose. 
GOLD NUGGETS. gold nugget, taken from a pocket in the banks 
In this photo of nuggets from the United States of of a stream in Colombia South America 
Colombia, the leaf-like appearance of the surface is well 2, 2 
shown. and this has been magnified about twenty 
ae 
times. The surface of this nugget presented a peculiar foliated, or “ graphic’ appearance, which 
the local miners attribute to the presence of a small quantity of the element Tellurium alloyed 
with the gold. Two similar nuggets from the same locality are shown slightly reduced from their 
natural size, and these also exhibit the characteristic laminated external structure, and in some of 
the interstices small particles of pure quartz have become embedded. 
JELLY-FISHES 
In one of our coloured plates we present the portraits of a few of the remarkable animals popularly 
known as Jelly-fishes. The name is “ good in part,” like a certain famous egg. The good part is 
the first word, for it very aptly describes the 
material of which these fairy-like creatures are 
built. Often the summer visitor to the seaside 
will find all that remains of one of the larger 
forms that has been left by the receding tide 
high and dry on the beach. The water of 
which it was largely composed has evaporated 
and left a mere film of hardened gelatine. Out 
of such slight material Nature fashions some 
of her most exquisite living forms. We have 
already dealt with several distinct types of the 
Jelly-fishes in this work, and it would be idle 
to go over the ground again, while so many 
other things await attention. We will content 
ourselves with mentioning the strange friend- 
ships which exist between certain species of 
Jelly-fishes and the fry of real fishes. 
The illustration on page Io0gg shows one 
of our larger Jelly-fishes, known as_ Rhizo- 
stoma, sheltering among its extensive ribbons 
a number of young horse-mackerel. Many of 
the Jelly-fishes possess long stinging threads, 
with which they paralyze the small creatures 
[P. Primrose. | upon which they feed. Rhizostoma does not 
MOSES ACOVEN) possess this power in so high a degree as 
uch faction thous murecrold. marnifed tweniy timer: many other species, but doubtless it benefits 
auriferous solutions. Some authorities claim that this must from the known deadly character of these 
have been fused, but this is not possible under the conditions TS. Among meas As tins Commer Stinger 
Photo by] 
of the surrounding country. 
