410 
HOT STRINGS. 
a small cataract, and walked about two miles through very 
tortile gardens to tho scam, which we found to bo in out 
of tho feedors of tho Lofubu, called Muatize or Motizo. 
Tho seam is in the perpendicular bank, and dips into the 
rivulet, or in a northerly direction. Thoro is, lirst of all, 
a seam ton inches in diameter, then somo shale, below 
which thcro is another seam, fifty-eight inches of which 
aro soon, and, as tho bottom touches tho water of tho 
Muatize, it may bo more. This part of tho scam is about 
thirty yards long. There is then a fault. About ono 
hundred yards higher up tho stream, black vesicular trap 
is seen, penetrating in thin veins tho clay shalo of tho 
country, converting it into porcellanito, and partially 
crystallizing tho coal with which it camo into contact. 
On tho right bank of tho Lofubu there is another feodci 
entering that rivor noar its confluence with tho Muatize, 
which is called the Morongozi, in which there is another 
and still larger bod of coal exposed. Farther up tho Lo- 
fubu thcro aro othor seams in the rivulets Inyavu and 
Makare; also sovoral spots in tho Maravi country havo 
tho coal cropping out. This has evidently been brought to 
tho surface by volcanic action at a later period than tho 
coal-formation. 
I also wont up tho Zambesi, and visited a hot spring 
called Nyamboronda, situatod in the bed of a small rivulet 
named Nyaondo, which shows that igneous action is not 
yot extinct. Wo landed at a small rivulet called Moko- 
rozi, thon went a mile or two to the eastward, whero we 
found a hot fountain at tho bottom of a high hill. A little 
spring bubbles up on ono side of tho rivulet Nyaondo, and 
a groat quantity of acrid steam rises up from tho ground 
adjacent, about twelve feet square of which is so hot that 
my companions could not stand on it with their baro foot- 
Thoro aro sovoral little holes from which the wator 
trickles; but tho principal spring is in a hole a foot in 
diamotor and about tho samo in depth. Numbors of 
bubbles aro constantly rising. Tho steam fools acrid ' n 
