| The work of Professor and Mme. curie was merely the final clue to guide the great search. |
| If the radon is extracted and sealed separately in a tube, radium A, B, C, will accumulate and the penetrating radiation for one curie of radon will be the same as for one gramme of radium. |
| Now, at the same time as many other investigators, Professor curie and his Polish wife took up the search. |
| It is one of many similar pinches sealed in little glass tubes and owned by Professor curie, of Paris. |
| Professor curie himself has a number of bad scars on his hands and arms due to ulcers caused by handling radium. |
| Madame curie laughed as if she had never noticed this before. |
