## Proceedings of the American Academy of Arts and Sciences, Volumen1Vol. 12 (from May 1876 to May 1877) includes: Researches in telephony / by A. Graham Bell. |

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Página 130

4 ) the triangles A DB , CDE are identical ; so that their

and their angles A B D , EC D are equal ; also the angle BAD equals the angle

CED . Hence the angle C of the triangle ACE equals the sum of the two angles B

...

4 ) the triangles A DB , CDE are identical ; so that their

**bases**A B , C E are equal ,and their angles A B D , EC D are equal ; also the angle BAD equals the angle

CED . Hence the angle C of the triangle ACE equals the sum of the two angles B

...

Página 131

The sum of the angles of any triangle is greater than a right angle . “ Let A B C

represent any triangle , and suppose ( for convenience ) that the angle A B C is

not less than either of the other angles of the triangle . Let the

in ...

The sum of the angles of any triangle is greater than a right angle . “ Let A B C

represent any triangle , and suppose ( for convenience ) that the angle A B C is

not less than either of the other angles of the triangle . Let the

**base**be extendedin ...

Página 132

Since the sum of the angles A B D , DBE is equal to 2 R , the sum of the angles at

the

consequently the angle BDE is not greater than the angle A BD - 2 , which is not ...

Since the sum of the angles A B D , DBE is equal to 2 R , the sum of the angles at

the

**base**of the isosceles triangle B DE is not greater than the angle A BD ;consequently the angle BDE is not greater than the angle A BD - 2 , which is not ...

Página 138

To find the value of n , that corresponds to the baseangles of any isosceles

triangle . “ Let A B C be any isosceles triangle ; having A B = CB = a , for its sides ,

and A C = for its

point ...

To find the value of n , that corresponds to the baseangles of any isosceles

triangle . “ Let A B C be any isosceles triangle ; having A B = CB = a , for its sides ,

and A C = for its

**base**, and let the**base**be produced in the direction AC to anypoint ...

Página 139

4 , that A BC , A B ' C ' are isosceles triangles , BE , B ' E being the perpendiculars

from their vertical angles to their

triangles by the right line B B ' = c , and put A B = BC = a , AC = b , AE . CE 6 = e =

ž ...

4 , that A BC , A B ' C ' are isosceles triangles , BE , B ' E being the perpendiculars

from their vertical angles to their

**bases**. Join the vertices of the isoscelestriangles by the right line B B ' = c , and put A B = BC = a , AC = b , AE . CE 6 = e =

ž ...

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### Pasajes populares

Página 187 - To INCREASE KNOWLEDGE. It is proposed — 1. To stimulate men of talent to make original researches, by offering suitable rewards for memoirs containing new truths; and, — 2. To appropriate annually a portion of the income for particular researches, under the direction of suitable persons.

Página 188 - The volumes of the memoirs to be exchanged for the transactions of literary and scientific societies, and copies to be given to all the colleges and principal libraries in this country. One part of the remaining copies may be offered for sale ; and the other carefully preserved, to form complete sets of the work, to supply the demand from new institutions.

Página 191 - The emphasis upon publications as a means of diffusing knowledge was expressed by the first Secretary of the Smithsonian Institution. In his formal plan for the Institution, Joseph Henry articulated a program that included the following statement: "It is proposed to publish a series of reports, giving an account of the new discoveries in science, and of the changes made from year to year in all branches of knowledge not strictly professional.

Página 188 - ... 3. The results obtained from these appropriations to be published: with the memoirs before mentioned, in the volumes of the Smithsonian Contributions to Knowledge.

Página 345 - Map of the Mineral Lands adjacent to Lake Superior, ceded to the United States by the Treaty of 1842 with the Chippewas.

Página 191 - LITERATURE AND THE FINE ARTS. 9. Modern literature. 10. The fine arts, and their application to the useful arts. 11. Bibliography. 12. Obituary notices of distinguished individuals.

Página 29 - Such is the state of our language,' says Sheridan, a man certainly not prejudiced against his native tongue, ' that the darkest hieroglyphics, or most difficult ciphers that the art of man has hitherto invented, were not better calculated to conceal the sentiments of those...

Página 156 - On three several Hurricanes of the Atlantic, and their Relations to the Northers of Mexico and Central America, with Notices of other Storms.

Página 189 - Solution of experimental problems, such as a new determination of the weight of the earth, of the velocity of electricity and of light; chemical analyses of soils and plants; collection and publication of articles of science, accumulated in the offices of government.

Página 157 - FLS On the Growth of Plants in closely glazed Cases. 8vo. London, 1842. From the Author. Two hundred and ninety-sixth Meeting. May 25, 1847. — ANNUAL MEETING. The PRESIDENT in the chair. A communication was received, through Mr. Bowen, from Mr. John B. Williams, US Consul at Russell, Bay of Islands, New Zealand, being a meteorological register kept at that place, by Mr. Williams, as follows : — METEOROLOGICAL REGISTER Kept at Russell, New Zealand, from April 24/A, 1843, to Aug.