Note: This text has been automatically extracted via Optical Character Recognition (OCR) software.
Lost And Saved ; Or Nellie Powers The Missionary's Daughter.
ties are the best talkers , some of them being remarkable for their power of imitation and beautiful plumage . After various attempts to make the bumboat man understand him , but Avithout success , Harry induced the man to come on board and bring his parrots , ancl then , pointing to the same one as before , he asked IIOAV much . A light seemed to cross the dealer ' s vision , ancl holding the parrot on his finger , and placing six silver quarters on the palm
of his hand , he pointed to them as much as to say that was the price of the parrot . Harry bore in mind the admonition of the captain , and remembered his success in purchasing the monkey , but he knew Nellie Avas looking on , so , rather than appear awkAvard , he handed over the money to the delighted merchant . The parrot took naturally to its new owners , but evinced a strong dislike for the monkey from the first , and betAveen them began a warfare Avhich finally ended fatally .
The captain , AvhUe in port , Avas busy attending to his various duties , and Harry and Nellie Avere left to take care of themselves . Together they Avandered about the city , drove through all the beautiful groves that surrounded it , and visited all the places of interest in its locality . Together they sailed about the harbour , and with boat hooks drew the sea fans and corals from the shoals , and early on pleasant mornings ' they strolled along the beach , gathering quantities of beautiful shells . ( To be Continued . )
On The Testing And Strength Of Railway Materials, &C.
ON THE TESTING AND STRENGTH OF RAILWAY MATERIALS , & c .
BY BEO . E . M . BANCBOJT , Mem . Civil and Mechanical Engineers' Society . CAST IRON . round numbers the strength of cast iron in compression equals the of the
IN square tensile force ; or , in other words , the resistance that cast iron of a good quality gives to a crushing or compressive strain is variously stated , by authorities on the subject , as from 40 to 48 tons per square inch of section , and from 6 to 8 tons per sectional inch for a tensile or stretching strain . Tabulated it stands :
Breaking Safe Working Strain . Strain . In compression .., 40 to 4 S 7 tons In tension 6 to 8 1 | „ It is clear from this that cast iron of good quality may , in compression , be strained to one-sixth of its greatest strength ; andin tensionto about one-fourth . Cast iron of
, , good quality will , when first broken , have a crystalline texture , and a slight indentation Avill be made if struck smartly Avith a heavy hammer . Sometimes this metal is specified to bear a tensile strain of 2 J tons before loss of elasticity , and 6 £ tons per square inch before fracture .
TEST BAES . These should be run each day as the castings are being made , and a good plan is to specify that the test bars must be cast on to the ends of the castings . One tost is that a bar 2 in . deep by lin . Avide on bearings 3 ft . apart , with a load of 25 cwt . placed on the centre , it should give one-quarter of an inch deflection , and carry 27 cwt . Avithout breaking . A second test is that of a bar lin . square placed at 4 ft . 6 in . bearing . In this test the bar should not break with a less load than 6001 bs . placed on the centre . The above tests are for hon to be used in compression ; Avhen required to be used in tension even higher standards are advisable . Some engineers insist that these shall be dead
Note: This text has been automatically extracted via Optical Character Recognition (OCR) software.
Lost And Saved ; Or Nellie Powers The Missionary's Daughter.
ties are the best talkers , some of them being remarkable for their power of imitation and beautiful plumage . After various attempts to make the bumboat man understand him , but Avithout success , Harry induced the man to come on board and bring his parrots , ancl then , pointing to the same one as before , he asked IIOAV much . A light seemed to cross the dealer ' s vision , ancl holding the parrot on his finger , and placing six silver quarters on the palm
of his hand , he pointed to them as much as to say that was the price of the parrot . Harry bore in mind the admonition of the captain , and remembered his success in purchasing the monkey , but he knew Nellie Avas looking on , so , rather than appear awkAvard , he handed over the money to the delighted merchant . The parrot took naturally to its new owners , but evinced a strong dislike for the monkey from the first , and betAveen them began a warfare Avhich finally ended fatally .
The captain , AvhUe in port , Avas busy attending to his various duties , and Harry and Nellie Avere left to take care of themselves . Together they Avandered about the city , drove through all the beautiful groves that surrounded it , and visited all the places of interest in its locality . Together they sailed about the harbour , and with boat hooks drew the sea fans and corals from the shoals , and early on pleasant mornings ' they strolled along the beach , gathering quantities of beautiful shells . ( To be Continued . )
On The Testing And Strength Of Railway Materials, &C.
ON THE TESTING AND STRENGTH OF RAILWAY MATERIALS , & c .
BY BEO . E . M . BANCBOJT , Mem . Civil and Mechanical Engineers' Society . CAST IRON . round numbers the strength of cast iron in compression equals the of the
IN square tensile force ; or , in other words , the resistance that cast iron of a good quality gives to a crushing or compressive strain is variously stated , by authorities on the subject , as from 40 to 48 tons per square inch of section , and from 6 to 8 tons per sectional inch for a tensile or stretching strain . Tabulated it stands :
Breaking Safe Working Strain . Strain . In compression .., 40 to 4 S 7 tons In tension 6 to 8 1 | „ It is clear from this that cast iron of good quality may , in compression , be strained to one-sixth of its greatest strength ; andin tensionto about one-fourth . Cast iron of
, , good quality will , when first broken , have a crystalline texture , and a slight indentation Avill be made if struck smartly Avith a heavy hammer . Sometimes this metal is specified to bear a tensile strain of 2 J tons before loss of elasticity , and 6 £ tons per square inch before fracture .
TEST BAES . These should be run each day as the castings are being made , and a good plan is to specify that the test bars must be cast on to the ends of the castings . One tost is that a bar 2 in . deep by lin . Avide on bearings 3 ft . apart , with a load of 25 cwt . placed on the centre , it should give one-quarter of an inch deflection , and carry 27 cwt . Avithout breaking . A second test is that of a bar lin . square placed at 4 ft . 6 in . bearing . In this test the bar should not break with a less load than 6001 bs . placed on the centre . The above tests are for hon to be used in compression ; Avhen required to be used in tension even higher standards are advisable . Some engineers insist that these shall be dead