"I want
to make sure that we were right in our former calculations as to
the position of the Pandora. The least error would throw us off."
Using the sextant and other apparatus, some of which Tom had
invented himself, the exact position of the submarine was
calculated. As the last figure was set down and compared with
their previous location, one of the men who had been doing the
computing gave an exclamation.
"What's the matter?" asked Tom.
"Look!" was the answer, and he pointed to the paper. "There's
where a mistake was made before. We were at least two miles off
our course
"You don't say so!" exclaimed Tom, and, taking the sheet, he
went rapidly over the results.
CHAPTER XIX
THE SERPENT WEED
All waited eagerly for Tom Swift to verify the statement of the
other mathematician, and the young inventor was not long in doing
this, for he had what is commonly known as a "good head for
figures."
"Yes, I see the mistake," said Tom. "The wrong logarithm was
taken, and of course that threw out all the calculations.
Pages:
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179