men of invention and industry-第24章
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recompense for the time spent by him for the general good of
mankind。〃 This grateful attention was all the more praiseworthy;
as Sardinia could not in any way be regarded as a great maritime
power。
Harrison was now becoming old and feeble。 He had attained the
age of seventy…four。 He had spent forty long years in working
out his invention。 He was losing his eyesight; and could not
afford to wait much longer。 Still he had to wait。
〃Full little knowest thou; who hast not tried;
What hell it is in suing long to bide;
To lose good days; that might be better spent;
To waste long nights in pensive discontent;
To spend to…day; to be put back to…morrow;
To feed on hope; to pine with fear and sorrow。〃
But Harrison had not lost his spirit。 On May 30th; 1765; he
addressed another remonstrance to the Board; containing much
stronger language than he had yet used。 〃I cannot help
thinking;〃 he said; 〃that I am extremely ill…used by gentlemen
from whom I might have expected a different treatment; for; if
the Act of the l2th of Queen Anne be deficient; why have I so
long been encouraged under it; in order to bring my invention to
perfection? And; after the completion; why was my son sent twice
to the West Indies? Had it been said to my son; when he received
the last instruction; 'There will; in case you succeed; be a new
Act on your return; in order to lay you under new restrictions;
which were not thought of in the Act of the l2th of Queen Anne;'
I say; had this been the case; I might have expected some such
treatment as that I now meet with。
〃It must be owned that my case is very hard; but I hope I am the
first; and for my country's sake I hope I shall be the last; to
suffer by pinning my faith upon an English Act of Parliament。
Had I received my just rewardfor certainly it may be so called
after forty years' close application of the talent which it has
pleased God to give methen my invention would have taken the
course which all improvements in this world do; that is; I must
have instructed workmen in its principles and execution; which I
should have been glad of an opportunity of doing。 But how widely
different this is from what is now proposed; viz。; for me to
instruct people that I know nothing of; and such as may know
nothing of mechanics; and; if I do not make them understand to
their satisfaction; I may then have nothing!
〃Hard fate indeed to me; but still harder to the world; which may
be deprived of this my invention; which must be the case; except
by my open and free manner in describing all the principles of it
to gentlemen and noblemen who almost at all times have had free
recourse to my instruments。 And if any of these workmen have
been so ingenious as to have got my invention; how far you may
please to reward them for their piracy must be left for you to
determine; and I must set myself down in old age; and thank God I
can be more easy in that I have the conquest; and though I have
no reward; than if I had come short of the matter and by some
delusion had the reward!〃
The Right Honourable the Earl of Egmont was in the chair of the
Board of Longitude on the day when this letter was readJune 13;
1765。 The Commissioners were somewhat startled by the tone which
the inventor had taken。 Indeed; they were rather angry。 Mr。
Harrison; who was in waiting; was called in。 After some rather
hot speaking; and after a proposal was made to Harrison which he
said he would decline to accede to 〃so long as a drop of English
blood remained in his body;〃 he left the room。 Matters were at
length arranged。 The Act of Parliament (5 Geo。 III。 cap。 20)
awarded him; upon a full discovery of the principles of his
time…keeper; the payment of such a sum; as with the 2500L。 he had
already received; would make one half of the reward; and the
remaining half was to be paid when other chronometers had been
made after his design; and their capabilities fully proved。 He
was also required to assign his four chronometersone of which
was styled a watchto the use of the public。
Harrison at once proceeded to give full explanations of the
principles of his chronometer to Dr。 Maskelyne; and six other
gentlemen; who had been appointed to receive them。 He took his
timekeeper to pieces in their presence; and deposited in their
hands correct drawings of the same; with the parts; so that other
skilful makers might construct similar chronometers on the same
principles。 Indeed; there was no difficulty in making them;
after his explanations and drawings had been published。 An exact
copy of his last watch was made by the ingenious Mr。 Kendal; and
was used by Captain Cook in his three years' circumnavigation of
the world; to his perfect satisfaction。
England had already inaugurated that series of scientific
expeditions which were to prove so fruitful of results; and to
raise her naval reputation to so great a height。 In these
expeditions; the officers; the sailors; and the scientific men;
were constantly brought face to face with unforeseen difficulties
and dangers; which brought forth their highest qualities as men。
There was; however; some intermixture of narrowness in the minds
of those who sent them forth。 For instance; while Dr。 Priestley
was at Leeds; he was asked by Sir Joseph Banks to join Captain
Cook's second expedition to the Southern Seas; as an astronomer。
Priestley gave his assent; and made arrangements to set out。 But
some weeks later; Banks informed him that his appointment had
been cancelled; as the Board of Longitude objected to his
theology。 Priestley's otherwise gentle nature was roused。 〃What
I am; and what they are; in respect of religion;〃 he wrote to
Banks; in December; 1771; 〃might easily have been known before
the thing was proposed to me at all。 Besides; I thought that
this had been a business of philosophy; and not of divinity。 If;
however; this be the case; I shall hold the Board of Longitude in
extreme contempt。〃
Captain Cook was appointed to the command of the Resolution; and
Captain Wallis to the command of the Adventure; in November;
1771。 They proceeded to equip the ships; and amongst the other
instruments taken on board Captain Cook's ship; were two
timekeepers; one made by Mr。 Larcum Kendal; on Mr。 Harrison's
principles; and the other by Mr。 John Arnold; on his own。 The
expedition left Deptford in April; 1772; and shortly afterwards
sailed for the South Seas。 〃Mr。 Kendal's watch〃 is the subject
of frequent notices in Captain Cook's account。 At the Cape of
Good Hope; it is said to have 〃answered beyond all expectation。〃
Further south; in the neighbourhood of Cape Circumcision; he
says; 〃the use of the telescope is found difficult at first; but
a little practice will make it familiar。 By the assistance of
the watch we shall be able to discover the greatest error this
method of observing the longitude at sea is liable to。〃 It was
found that Harrison's watch was more correct than Arnold's; and
when near Cape Palliser in New Zealand; Cook says; 〃this day at
noon; when we attended the winding…up of the watches; the fusee
of Mr。 Arnold's would not turn round; so that after several
unsuccessful trials we were obliged to let it go down。〃 From
this time; complete reliance was placed upon Harrison's
chronometer。 Some time later; Cook says; 〃I must here take
notice that our longitude can never be erroneous while we have so
good a guide as Mr。 Kendal's watch。〃 It may be observed; that at
the beginning of the voyage; observations were made by the lunar
tables; but these; being found unreliable; were eventually
discontinued。
To return to Harrison。 He continued to be worried by official
opposition。 His claims were still unsatisfied。 His watch at
home underwent many more trials。 Dr。 Maskelyne; the Royal
Astronomer; was charged with being unfavourable to the success of
chronometers; being deeply inte