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352   Art of Travel.

words for vocabularies, or of things that he has in store : now, there is a right and a wrong way of setting to work to make them. The wrong way is to divide the paper into equal parts, and to assign one of them to each letter in order. The right way is to divide the paper into parts of a size proportionate to the number of words in the English language which begin with each particular letter. In the first case the paper will be overcrowded in some parts and utterly blank in others, in the second it will be equally overspread with writing ; and an ordinary-sized sheet of paper, if closely and clearly written, will be sufficient for the drawing up of a very extended catalogue. A convenient way of carrying out the principle I have indicated is to take an English dictionary, and after having divided the, paper into as many equal parts as there are leaves in the dictionary, to adopt the first word of each leaf as headings to them. It may save trouble to my reader if I give a list of headings appropriate to a small catalogue. AVIe will suppose the paper to be divided into fifty-two spaces-that is to say, into four columns and thirteen spaces in each column-then the headings of these spaces, in order, will be as follows :

 

A

dial

pal

son

adv

eve

per

sta

app

fin

ple

sir

baI

gin

lire

cur

bil

lice

pro

tens

bre

imp

que

tos

cap

int

ree

tier

chi

k

reg

iamb

Col

Ian

ris

cue

corn

mac

sab

yen

cra

mil

sea

wea

dec

nap

sha

tiw or

dis

off

siz

s q z

Verification of Instruments.-On arriving at the sea-level, make daily observations with your boiling-point thermometer, barometer, and aneroid, as they are all subject to changes in their index-errors. As soon as you have an opportunity, compare them with a standard barometer, compare also your ordinary thermometer and azimuth-compass with standard instruments, and finally, have them carefully re-verified at the Kew observatory on your return to England. A vast deal

of labour has been wholly thrown away by travellers owing to

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