one uniform tint. Sometimes there were several tints in different parts, as in 1748, when, as we saw, one portion was blackish and the other ash-colored, the vial being then full, and the blood liquid, as afterwards appeared.
Again, the liquid blood is sometimes quite quiescent, yielding, indeed, to every movement of the ampulla, as water would, but when the ampulla is at rest on its stand, remaining in it as tranquil as water, with a level and smooth surface, and without the least indication of internal movement. Yet often it gives forth a froth or foam, which covers a part or all of the surface, which stains the glass dark or vermilion, and the remains or traces of which may be noticed on the mass when indurated afterwards; that is, if this foaming has continued until a solidification on the altar, or until the reliquary is locked up in the evening. Very often this foaming will cease after lasting half-an-hour or an hour. Its ending and disappearance is as fitful as its beginning.
Sometimes the motion is greater, and of a different character—an ebullition or boiling, as the Italians call it. Portions of the liquid blood are thrown up a quarter of an inch, or more. Sometimes this bubbling has been very violent, some of the liquid being thrown up into the neck of the ampulla to the very top.
On December 16, 1717, it is recorded that, before the liquefaction took place, and while the blood was still hard and solid, “an exhalation was seen to rise from the hard mass,
like to a little cloud, and to ascend to the top of the neck.” On 24th September, 1725, “the blood was taken out hard, and immediately liquefied; and three or four times, of itself, it moved round in a circle within the ampulla, although the ampulla was then in its place on the altar, and motionless.”
It is needless to cite any more of the thousand-and-one items of such character scattered through the diary. They all show the sincerity and good faith of the writers, and the care with which the minutest facts were observed, and accurately recorded on the day of their occurrence.
Next to the occurrence of the liquefaction, the most important fact, in our judgment, is the frequent change of volume which the mass undergoes while liquid. We say while liquid, for we do not discover, either in the diary or in our researches elsewhere, any indication of such a change taking place while the blood is in its solid condition. But, while liquid, such changes are so frequent and so great that the diary, as we saw, noticed their absence or quasi-absence, during one octave, as something remarkable. The blood is said to be at its ordinary or normal level when it fills about four-fifths of the space in the ampulla, or vial. It has been known to sink below this, but very rarely. Ordinarily it is oscillating in volume, sometimes reaching the neck, or entering it so high as to leave only a thread of light, or even filling the neck up to where it enters the mass of soldering. The extreme distance between the two levels is about an inch and a half, and the volume must increase over twenty per cent. in order to rise from the ordinary level so as to fill completely the ampulla. The days are comparatively rare when
some change of volume is not seen, either by increase or by decrease. The change is generally gradual, yet such as may be watched and followed. Sometimes, however, it is quite rapid in the ascent or the descent, or in its alternations of rising and falling; sometimes almost instantaneous—in un colpo, in un tratto.
These ordinary oscillations or changes of volume, which occur at any time, may be looked on as the usual and minor form of one general and striking trait or mode of action. When the increase is carried to its utmost extent, the vial is seen to be completely filled; and this fulness, in turn, presents many variations to be studied. We may divide them into two classes. The first embraces all those cases in which the fulness terminates, and the blood commences to diminish in volume, at any time before the close of the octave; we may call these completed periods. The second embraces all those in which the fulness continues to the end, so that, on the last day of the octave, the blood is replaced in its closet still completely filling the ampulla; these we call incomplete periods.
To the prior class belong, first, all those many instances in which the blood swelled up and filled the ampulla and commenced to sink again in volume on the same day, whether after a few moments or after several hours of fulness. Again, the diary records three cases in which it so rose one day and sank the next; four cases in which it rose one day and sank the second day after, keeping the ampulla completely full for the entire intermediate day; six cases in which there were two such intermediate days; two with three, and four with four such intermediate days of complete fulness. We have thus nineteen cases recorded